If they fail to do so then they can kiss their congressional control goodbye in the midterms.
It doesn't work like that, sorry.
I don't think the people will put up with two years of a partially functioning court--the GOP tends to do better in midterms because of turnout and I think this could be used to motivate Democrats to show up.
Nah. The GOP won't be punished for their behavior because Republicans are the only ones who actually bother to vote in midterms, and 2018 will be as big a landslide for Republicans as the last two midterms. Of course, two years after that, when the electorate isn't solely composed of white Republicans, Clinton (or a different Democrat if she decides not to seek reelection) will win reelection by a decent margin.
How did the democrats sweep Congress in 2006?