What's happening today on the campaign trailVice President Kamala Harris, the clear front-runner for the Democratic nomination for president, held her first campaign rally since she jumped in the race in Milwaukee.In her speech, she contrasted her record as a prosecutor with former President Donald Trump's legal issues. "I know Donald Trump's type," she said to resounding cheers and chants of "Kamala!"Harris gained the backing of a majority of pledged Democratic convention delegates yesterday, the first full day of her presidential campaign. She also nabbed two key endorsements today: those of Senate Majority Leader Chuck Schumer and House Minority Leader Hakeem Jeffries, both of New York.The Trump campaign has had to revise its strategy after the Democratic shakeup. Trump said this afternoon that he would "absolutely" commit to debating Harris.