What’s happening on the campaign trail todayFormer President Donald Trump returned to the campaign trail today for his first rally since last weekend’s assassination attempt. Trump quickly resumed attacks on President Joe Biden after saying he wanted he wanted to serve as a unifier, calling his political opponent “Crooked Joe.”Trump was introduced at the Grand Rapids, Michigan, rally by his running mate, Sen. JD Vance of Ohio, who also criticized his counterpart, Vice President Kamala Harris.Biden is in Delaware with Covid as pressure mounts on him to drop his re-election bid. While the Biden campaign insists the president is remaining in the race, members of his family have begun discussing what an exit from his campaign might look like.At least 35 congressional Democrats, including four senators, have called on Biden to step aside, with many warning that his candidacy could harm party candidates in down-ballot races.