The new Democrat Senate will confirm whoever the nominee is between January 3, 2017 and Inauguration Day.
Blocking it is still a good deed, but the criticism that “it will cause the loss of the Senate” may well be valid.
The GOP won’t lose the majority, they will increase it if this election is a referendum on American Freedoms. Every Dem gunowner will vote GOP if this is framed correctly.
ANd, the turnout from evangelicals will be HUGE as one more lib on the court will kill religious freedoms and everything else evangelicals hold dear.