McCaul, a representative for six terms and chair of the House Homeland Security Committee, has not yet made a decision but likewise has not yet ruled out a possible Senate run. Later, on September 23, 2016, Cruz publicly endorsed Trump for president. Peter Thiel, a billionaire PayPal co-founder and Silicon Valley investor, delivered a manifesto for tackling the greater issues of the day, focusing on technology, the economy and small government. Thiel also affirmed his pride to be "gay, a Republican and most of all an American", a stance that earned him a standing ovation, chanting "USA!". It was the first time in the history of Republican National Conventions that a speaker identified himself as gay in his speech, although there have been previous speeches by gay men. Trump, having been formally nominated as the Republican presidential nominee on the second night of the convention, spoke on the fourth and final night of the convention. Trump's speech was leaked hours in advance by Correct the Record, a liberal-leaning Super PAC, though Trump had already given copies of his speech to the network press pool. Trump's daughter, Ivanka Trump, introduced Trump in a speech immediately before his own speech. "Here Comes the Sun" was used as the entrance music for Ivanka Trump. The George Harrison estate complained about the use of this song, which his family said was "offensive and against the wishes of the George Harrison estate." Trump spoke for 75 minutes, making his speech the longest since at least the 1972 Republican National Convention and one of the longest acceptance speeches ever in major-party convention history. In his speech, Trump stated that America faces a "crisis" due to "attacks on our police" and "terrorism in our cities," and emphasized an important theme in his campaign: law and order. In evaluating the speech, Glenn Thrush of "Politico" noted the influence of Richard Nixon, Spiro Agnew, Ronald Reagan, and Rudy Giuliani, all of whom sounded similar themes earlier in American history in attempts to win over the "Silent Majority". Trump also promised to limit American participation in global crises and trade deals. When Trump turned to the subject of illegal immigration, many in the audience began shouting "Build the wall, build the wall," referring to a signature promise of Trump's campaign to build a wall on the Mexico–United States border. Trump also repeatedly attacked President Barack Obama and the Democratic presumptive nominee, Hillary Clinton, arguing that the country and world had become less safe during their time in office. However, Trump attempted to reach out to supporters of defeated Democratic candidate Bernie Sanders, as well as down-and-out urbanites.