It is possible this saves a few incumbents, but it certainly brings the brand of the party down nationally. The prominence of Democrats Against Democrats - which the news media love to cover, of course - does not exactly help further whatever we imagine the agenda of the Democrats is, even if it saves some suburban Ohio member of Congress who hates immigrants, abortion, trans people, and "socialism."
I don't think this will help Republicans in the midterms, precisely, but pretending to distance themselves from Trump won't help them either.
But Trump himself has rejected that approach. House and Senate Democrats, the president noted during the meeting, will make their fall campaigns a referendum on him. His advisers told him that the poor polling reflects the fact that the voting public still does not know about many of his accomplishments—the dozens of new stock-market highs, a decline in fentanyl deaths, the “sealed” southern border, the increase in domestic-manufacturing production.The solution Trump settled on, according to three people familiar with the meeting, was to lean into the Democratic strategy of focusing on himself. The president ordered a series of television advertisements about his own record that will serve as a backdrop to the hundreds of individual House and Senate contests. Trump wanted what one person described to us as “environmental lift” ads—commercials that would focus on nationalizing the midterms broadly around his victories—and he suggested that the ad makers mine his own on-camera statements as building blocks. “Go look at the clips,” the president told his team, according to this person. “I cite accomplishments all the time.”
It is smarter than "we know we're shit but vote for us anyway."