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 (CNN) Sen. John McCain pushed back Saturday night against President Donald Trump's reversal of an agreement to sign onto a statement by the G7 countries, saying that Americans would continue to stand with its historical allies. 
 
 "To our allies: bipartisan majorities of Americans remain pro-free trade, pro-globalization & supportive of alliances based on 70 years of shared values," the Arizona senator tweeted . "Americans stand with you, even if our president doesn't." 
 
 Earlier in the evening, Trump tweeted that Canadian prime minster Justin Trudeau was "meek" and "mild" and that his statements were " false ." 
 
 Shortly after Trudeau said in an afternoon news conference that he was "happy to announce that we have released a joint communique by all seven countries" indicating that the US had signed on, Trump announced the US would reverse its decision and not join in the statement after all. 
 
 At the news conference, Trudeau also said Canada will "move forward with retaliatory measures" on July 1 in response to the Trump administration's decision to impose tariffs on steel and aluminum imports from Canada, the European Union and Mexico. 
 
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 "Trudeau made an error. He should take it back," White House economic adviser Larry Kudlow said of Canadian Prime Minister Justin Trudeau. | Alex Wong/Getty Images Kudlow: Trudeau ‘stabbed us in the back’ 
 
 White House economic adviser Larry Kudlow repeatedly accused Canadian Prime Minister Justin Trudeau of “betrayal” and saying he “stabbed us in the back” for standing up to President Donald Trump after the G-7 meeting. 
 
 Speaking hours after Trump ordered the U.S. not to endorse the G-7 communique, Kudlow slammed Trudeau for a “sophomoric play” in holding a press conference after the G-7 meetings and saying Canadians “will not be pushed around.” Soon afterward, Trump tweeted that the U.S. would not participate in the G-7 communique agreed to earlier on Saturday. 
 
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 “He really kind of stabbed us in the back,” said Kudlow, the White House National Economic Council director, speaking on CNN‘s “State of the Union.“ 
 
 Kudlow, who said he was in the bilateral meeting with Trudeau and Trump, said the two leaders “were getting along famously.” 
 
 “We were very close to making a deal with Canada on NAFTA, bilaterally perhaps, and then we leave and Trudeau pulls this sophomoric, political stunt for domestic consumption.” 
 
 Kudlow told Jake Tapper he likes Trudeau personally, but that the Canadian leader was trying to score political points in attacking Trump. 
 
 "Trudeau made an error. He should take it back. He should pull back on his statements," Kudlow said. 
 

– The White House is not letting up in its attack on Canadian Prime Minister Justin Trudeau in the wake of a rocky G7 summit. After President Trump assailed Trudeau as "dishonest & weak" in tweets just after leaving Canada on Saturday night, White House National Economic Council director Larry Kudlow took to CNN's State of the Union on Sunday morning to keep up the drumbeat. "He really kind of stabbed us in the back," said Kudlow, per Politico. "We were very close to making a deal with Canada on NAFTA, bilaterally perhaps, and then we leave and Trudeau pulls this sophomoric, political stunt for domestic consumption." One person not having it was John McCain, notes CNN, who tweeted, "To our allies: bipartisan majorities of Americans remain pro-free trade, pro-globalization & supportive of alliances based on 70 years of shared values," the Arizona senator tweeted. "Americans stand with you, even if our president doesn't."