If the Republican senators are smart, and that is debatable, they'll realize that the longer they allow this circus to drag itself out, the more long term damage that the GOP is going to suffer. The Democrats are going to hate whoever the Republican president is, it doesn't matter. If John McCain was resurrected from the grave, and became president, they would do whatever they thought was necessary to remove him from office. This has never been about anything Trump did, it's been about the fact that the Democrats are not in power.