Democratic Senators Consider Reviving Losing Issue
Democrats Split Over Filibuster On Alito
The usual suspects in the Senate are calling for a filibuster to satisfy the most liberal members of their base even though they know it would be doomed to failure. So basically they're acknowledging that any filibuster is a waste of everyone's time and would amount to simple grandstanding.
Personally I hope they try it because it would revive the courts issue for this year's elections. It's been a complete loser for the Democrats for the last two election cycles, so bringing it to the public limelight can only hurt them at the polls this fall.