Liberals don't realize their own vulnerability on pushing the court to the left
One of the reasons that Democrats use the courts to impose their social engineering is that they know they could not win an election on the issues. That is why they are the ones really vulnerable in pushing to nominate another liberal ideologue to the court. Ted Cruz has made it clear that he is willing to have an election on the issue if he is nominated by the GOP.
Republican senators who are thought most susceptible to a political backlash for blocking any new Supreme Court nominee appear to be shaking off concern and joining the call to wait for the next president to fill the vacancy caused by Antonin Scalia’s death. And that is just fine with some Democrats.