Democrats expect Burris to show up on Capitol Hill on Tuesday with a certificate of appointment signed by Blagojevich but missing the signature of Illinois Secretary of State Jesse White, according to the Democratic source and a Democratic Senate leadership aide.

CNN: Burris to meet with Dem leaders, source says

Reid said that he is waiting for a ruling from the Illinois high court on whether Illinois Secretary of State Jesse White needs to sign the certificate of appointment for Burris.

CNN: Democrat: Blagojevich 'called our bluff' on Senate pick