Vice President Kamala Harris will goad former President Donald Trump on his home turf Tuesday with an ad attack montage of former staffers who now renounce him. Harris’ new campaign ad will air in Palm Beach, Fla. — home to Mar-a-Lago — Philadelphia and nationwide on Fox News hours before the pair’s first presidential debate in Pennsylvania, the campaign announced. “When Trump took office, he said he would hire only ‘the best people,’ and now those very people who know him best refuse to support him,” said Harris-Walz campaign spokesperson Quentin Fulks. Want more breaking political news? Clic…