Trump is preparing to swoop into Ohio on Saturday to rally Republicans behind J.D. Vance in a key Senate race. Two weeks earlier, he did the same for Mehmet Oz in Pennsylvania.
Neither candidate invited him.
Instead, aides to the former president simply informed the Senate campaigns that he was coming. Never mind that Mr. Trump, while viewed heroically by many Republicans, remains widely disliked among crucial swing voters.
Some of Mr. Trump’s chosen candidates, after pasting his likeness across campaign literature and trumpeting his seal of approval in television ads during the primaries, are now distancing themselves, backtracking from his positions or scrubbing their websites of his name.
The moves reflect a complicated political calculus for Republican campaigns, which want to exploit the energy Mr. Trump elicits among his supporters — some of whom rarely show up to the polls unless it is to vote for him — without riling up the independent voters needed to win elections in battleground states.
In North Carolina, Bo Hines, a Republican House candidate who won his primary in May after proudly highlighting support from Mr. Trump, has deleted the former president’s name and image from his campaign site. A campaign official described the move as part of an overhaul of the website to prioritize issues that are important to general-election voters.
In Wisconsin, Tim Michels, the Republican nominee for governor, erased from his campaign home page the fact that Mr. Trump had endorsed him — but then restored it after the change was reported, saying it had been a mistake.