According to the Rock and Roll Hall of Famer, Donald Trump started his presidential run with a heist … of Neil Young’s classic rock anthem. It made for a hell of an entrance as Donald and his wife Melania marched up to the podium while Young’s “Rockin’ In the Free World” blared at Trump Tower. Totally patriotic … to everyone but Young. Neil’s rep tells TMZ that Trump never got permission to use the song for his candidacy announcement, and furthermore — Neil, a Libertarian and Canadian citizen, is NOT down with Trump’s campaign. Sources say he’s actually backing Vermont Sen. Bernie Sanders.