Republican presidential candidates face off Wednesday in the second series of debates, this time hosted by CNN. There will be two debates: the first debate, for four low-polling candidates, starts at 6 p.m., and the second debate, with 11 higher-polling candidates, is scheduled to start at 8 p.m. Here is our live blog. 

 SIMI VALLEY, Calif. (AP) — The latest on the GOP presidential debates at the Reagan Presidential Library in Simi Valley, Calif. (all times local): 
 
 Republican presidential candidates, former New York Gov. George Pataki, left, former Pennsylvania Sen. Rick Santorum, second from left, Louisiana Gov. Bobby Jindal, second from right, and Sen. Lindsey... (Associated Press) 
 
 Republican presidential candidates, former New York Gov. George Pataki, left, former Pennsylvania Sen. Rick Santorum, second from left, Louisiana Gov. Bobby Jindal, second from right, and Sen. Lindsey... (Associated Press) 
 
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 4:20 p.m. 
 
 Former Pennsylvania Sen. Rick Santorum is making a hard pitch for a higher minimum wage, a position uncommon among the Republican presidential candidates. 
 
 He says it's not just economic, it's a way Republicans can win. 
 
 Santorum says, "How are we gonna win if 90 percent of Americans don't think we care about them and their chance to rise in America?" 
 
 However, South Carolina Sen. Lindsey Graham says a federal increase in the minimum wage would hurt businesses. Referring to his parents' business when he was a child, Graham says, "I don't know if my parents could have afforded a 50-cent increase." 
 
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 4:06 p.m. 
 
 A CNN production employee sitting in the spin room away from the auditorium broke into the video feed in the news media filing center, interrupting the argument between Lindsey Graham and Bobby Jindal over term limits. 
 
 The unidentified employee was unaware he was on camera, rather than the candidates in the Reagan library, until well into the interruption. He looked up, suddenly surprised to see himself on the monitor. 
 
 "This doesn't sound good," he says, before the feed returned to the debate stage. 
 
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 4:05 p.m. 
 
 South Carolina Sen. Lindsey Graham is making fighting terrorism the overarching theme of his debate performance. 
 
 When asked about gay marriage, Graham said the Supreme Court ruling has made same-sex marriage the law of the land. 
 
 Then he quickly pivoted to his issue of choice: "Radical Islam would kill you all if it could," he said. "Let's not lose sight of the big picture." 
 
 His remarks came amid a larger dispute over whether Kim Davis, the Kentucky clerk who refused to issue marriage licenses to gay couples, was acting legally. 
 
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 3:55 p.m. 
 
 Former New York Gov. George Pataki says Kentucky clerk Kim Davis should have been fired for refusing to issue a marriage license to a same-sex couple. 
 
 But former Pennsylvania Sen. Rick Santorum, speaking in the second-tier Republican presidential debate, equates her decision with Martin Luther King's civil disobedience. Santorum says Davis has a fundamental right under the First Amendment to deny the license. He says there has to be room in America for such a demonstration of religious beliefs. 
 
 Pataki says there is a "huge difference" between standing up for religious beliefs and ignoring the rule of law as an elected official. 
 
 South Carolina Sen. Lindsey Graham says he doesn't agree with the Supreme Court's ruling, but since same-sex marriage is legal the law must be followed. 
 
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 3:51 p.m. 
 
 The second-tier Republican presidential contenders are discussing the case of a 14-year-old arrested for bringing a homemade clock to his high school. 
 
 At the GOP presidential debate, Louisiana Gov. Bobby Jindal was asked about the case of Texas student Ahmed Mohammed. Police suspected the boy's science project was a bomb. President Obama tweeted in Ahmed's support earlier Wednesday. 
 
 Jindal said the country shouldn't back off its vigilance against Islamic extremism and said the greatest discrimination in America is against Christians. He did say a 14-year-old should not be arrested for bringing a clock to school. 
 
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 3:45 p.m. 
 
 Louisiana Gov. Bobby Jindal says the answer to the Syrian refugee crisis is not allowing more people to come into the United States. 
 
 Jindal says in the second-tier Republican presidential debate that the answer is to hunt down and "destroy" the Islamic State. He says enemies do not fear or respect the U.S. 
 
 South Carolina Sen. Lindsey Graham says blame rests with President Obama. He says the president's policies for combating Islamic terrorists are not working. 
 
 Former New York Gov. George Pataki references the Sep. 11 terrorist attacks, saying the U.S. is at greater risk of attack now than then. 
 
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 3:40 p.m. 
 
 South Carolina Sen. Lindsey Graham and former Pennsylvania Sen. Rick Santorum are vigorously arguing over immigration reform. 
 
 Graham supports allowing people in the country illegally to stay, arguing in part that Hispanic voters are an untapped source for Republicans. Graham says sharply, "In my world Hispanics are Americans." 
 
 Santorum says he had a bill in 2006 to address illegal immigration, though it did not advance in the Senate. 
 
 Santorum, who supports slowing legal immigration, says, "American workers are being hurt by immigration." 
 
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 3:35 p.m. 
 
 The Republican presidential candidates are fighting over whether the U.S. should immediately deport 11 million undocumented immigrants already living in the country. 
 
 Former Pennsylvania Sen. Rick Santorum is accusing much of the GOP field of supporting "amnesty" by proposing plans to legalize some illegal workers. 
 
 Former New York Gov. George Pataki and South Carolina Sen. Lindsey Graham say deporting millions of people is impossible. Says Graham: "I'm trying to fix the problem. We're not going to deport the 11 million here." 
 
 All four candidates say they would secure the border and crack down on local officials who opt not to prosecute illegal immigrants. 
 
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 3:35 p.m. 
 
 Donald Trump isn't in the second-tier GOP presidential debate but he's still dominating it. 
 
 The first several questions were about the reality show star and front-runner. Louisiana Gov. Bobby Jindal defended his attacks of Trump. He argued the developer "isn't serious." Former Pennsylvania Sen. Rick Santorum said he'd spend his time attacking Democrat Hillary Clinton rather than other Republicans. Former New York Gov. George Pataki was asked about his statement that he wouldn't support Trump if he were the Republican nominee. 
 
 That led Pataki to complain about all the opening questions being about Trump. 
 
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 3:30 p.m. 
 
 The immigration portion of the Republican presidential debates was well under way in California hours before the candidates begin talking. 
 
 Dozens of protesters angry about Republicans who oppose citizenship for millions of people in the U.S. illegally gathered at the entry to the Ronald Reagan Presidential Library compound. 
 
 Immigration advocates in Latino-heavy southern California are beating drums and carrying signs that say, "Are you going to deport me?" 
 
 There are also people wearing oversized papier mache caricature heads of businessman Donald Trump, Florida Sen. Marco Rubio and Wisconsin Gov. Scott Walker. Trump and Walker have taken a harder line on immigration, while Rubio has stepped back from his support for a path to citizenship for people in the country illegally. 
 
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 3:20 p.m. 
 
 The first question in the second-tier GOP presidential debate is for Louisiana Gov. Bobby Jindal. CNN reporter Jake Tapper has asked Jindal why he is violating Ronald Reagan's famous dictum to not attack other Republicans. Jindal has been explicitly attacking Trump for days. 
 
 Jindal replied that Trump "is not a conservative" and GOP candidates should stop treating him like a Republican. Reagan's rule, Jindal said, doesn't apply to Trump. 
 
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 3:15 p.m. 
 
 The early debate among the second-tier of Republican candidates for president is under way. 
 
 The four candidates whose polling numbers didn't qualify them for the main event starting at 5 p.m. are introducing themselves to the crowd at the Reagan Library in southern California. They are former Pennsylvania Sen. Rick Santorum, former New York Gov. George Pataki, Louisiana Gov. Bobby Jindal and South Carolina Sen. Lindsey Graham. 
 
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 2:30 p.m. 
 
 The 16 Republican candidates are poised to take the stage for the marathon pair of debates, President Ronald Reagan's plane at their backs and a trio of questioners before them. 
 
 First up: Four candidates who did not qualify for the top-tier group debating later. They are former Sen. Rick Santorum, former New York Gov. George Pataki, Louisiana Gov. Bobby Jindal and South Carolina Sen. Lindsey Graham. Some of what they say, if interesting enough, could be played at the later debate between 11 hopefuls who performed better in the polls, according to sponsor CNN. 
 
 The main event includes 10 men and one woman — business executive Carly Fiorina — arrayed shoulder-to-shoulder. At center, front-runner Donald Trump. On either side: retired neurosurgeon Ben Carson and former Florida Gov. Jeb Bush. The others will be arrayed outward, with Kentucky Sen. Rand Paul and New Jersey Gov. Chris Christie at the ends. 
 
 Altogether, the event is expected to last about five hours.
– The Muslim boy who was arrested today because teachers thought his homemade clock was a bomb surfaced as a subject in today's early debate on CNN among the four lower-tiered candidates. Asked about striking a balance between vigilance and discrimination, Bobby Jindal first emphasized that Muslim leaders must denounce terrorism because the US is "in a war with radical Islam." Then, pressed on the discrimination part, he added, "I don't think a 14-year-old boy should ever be arrested for bringing a clock to school." Jindal then pivoted to assert that Christians were facing discrimination, too, and brought up the Kim Davis case in Kentucky, reports the Washington Post. "Let's talk about that." While Jindal and Rick Santorum defended Davis, George Pataki said she would have been fired is she were his employee for violating the law. Santorum wondered how many clerks, florists, etc. would be tossed into jail for defending their religious beliefs, but Pataki wasn't sympathetic, notes the Wall Street Journal. "We’re going to have a president who defies the Supreme Court?” he says. “Then you don’t have a rule of law.” As for Lindsey Graham, he said that while he disagrees with the court's ruling on gay marriage, he said the law must be followed, reports AP. "Kim Davis, I'm not worried about her attacking me," he added. "I am worried about radical Islamic terrorists who are already here planning another 9/11. We're at war, folks. I'm not fighting a crime."