Biden in 1992: 
Bush Should "Not Name A Nominee Until After The November Election"
http://www.realclearpolitics.com/video/2016/02/22/biden_in_1992_bush_should_not_name_a_nominee_until_after_the_november_election.html

 

Then-Senator Barack Obama said  in 2006 that he supported the Democratic-led filibuster to stop Justice Samuel Alito from making it to the Supreme Court.


 

10 Times Democrats Vowed To Block Republican Court Nominees
http://thefederalist.com/2016/02/16/10-times-democrats-vowed-to-block-republican-nominees/

Schumer in 2007: Don't confirm any Bush Supreme Court nominee

The late Sen. Ted Kennedy (D-Mass.) led an opposition coalition, which attempted to filibuster to block the confirmation process. Kennedy was joined by Sen. Patrick J. Leahy (D-Vt.), Sen. Richard J. Durbin (D-Ill.), Sen. Ken Salazar (D-Colo.), and Sen. Max Baucus (D-Mont.), who publicly stated they opposed Alito’s confirmation.