Um - do you honestly think the Repubs are going to be able to stonewall for 11 months?
Not a chance.
Especially since the Worm is going to nominate Cruz to fill the slot. Purely for the chaos value, if nothing else.
All the Senate majority has to do... is nothing. There is no legislative mechanism for the Democrat minority to force a vote on whoever the "Worm" sees fit to nominate. As long as Mitch McConnell declines to act on a nomination, nothing will happen, absent a "recess appointment", which while theoretically possible (and which has occurred), is easily avoided by keeping the Senate in session by simple,
pro forma means.
As for nominating Cruz, well, that would be a hoot. Won't happen. Obama will choose a nominee of his own ideological proclivity, likely drawn from the ranks of whatever heretofore under-pandered-to minority group he thinks will most benefit the Democrats by means of Republican obstruction, in the fall election.