I am not surprised that Republican Senators who otherwise seem to oppose Trump, like Romney, are all in on getting their Supreme Court Justice approved. The whole reason why they have been tolerating Trump is to get those Justices and there is no way they are not going to claim that prize. Further, I think they see it it likely Trump will lose and it is possible they could lose the Senate, so that have to do it now or never. Republicans are long past the point where fairness matters, and their constituency is only their tribe and not Americans in general. From their point of view, given Supremes are for life, SCOTUS is their last chance to secure their way of life for the next decade.