MIAMI — President Joe Biden and former President Donald Trump are doing last-minute South Florida campaign stops to boost their party’s candidates ahead of the midterm election. A week before the election, Biden is campaigning with U.S. Rep. Val Demings and Charlie Crist in Miami Gardens, according to the campaigns of both Democratic candidates. Biden, whose visit to South Florida will be his first political event in the state since he took office, was already scheduled to attend a fundraiser on Nov. 1 for Crist, who is challenging Republican Gov. Ron DeSantis. The Democratic National Committe...