I agree IF it's a close election. But if Trump keeps Michigan, Pennsylvania, Wisconsin, Georgia, and at least one of Arizona/Nevada blue AND helps turn North Carolina blue and gives Dems an unexpected Senate seat somewhere, there's going to be a reckoning between GOP leadership and the Republican power brokers. The GOP was able to jump right back on the Trump train in 2022--after if became abundantly clear that no one gave a fuck about Ron DeSantis--because, if you squint, the 2020 election was pretty close, and Biden was wildly unpopular at the time.
There's a reason why they made Trump wait until after the midterms to announce though. They realize that Trump is poison to their election chances, so if this election proves once and for that he--and his approved cronies--absolutely cannot win in purple states, then something will have to change.
But I think it will be close on Tuesday and they'll take the Senate, so, yeah, we're stuck with Trump as the party until he dies.