Sanders attacks 'dangerous' Trump at campaign launch

US Senator Bernie Sanders returned to the place of his birth Saturday to deliver the first rally speech of his presidential campaign, vowing to defeat "the most dangerous president in modern American history" in Donald Trump."I want to thank all of you for being part of a campaign which is not only going to win the Democratic nomination, which is not only going to defeat Donald Trump, who is the most dangerous president in modern American history," Sanders told the crowd of several thousand peop