Meghan McCain on Sunday said that Donald Trump’s controversial rally at Madison Square Garden could “backfire” against him. Trump spoke in New York at an event many say was planned to mirror an infamous gathering of Nazis in the 1930s. Even some of Trump’s top allies have condemned one “racist comment” from the massive event. Meghan McCain, the political commentator and daughter of legendary Republican lawmaker John McCain, supports Trump in the election but is worried that the rhetoric at the rally could hurt him nine days from Election Day. Want more breaking political news? Click for the la…