Actually they should not even have to do the three day thing. The House and Senate are the only ones who can say if they are or are not in session or in recess. They get to set their own rules. What O did is unconstitutional, period.
Including things such as a 20% vote is a majority, and a 1% presence is a quorum? I mean, I know they SAY they are in session (which implies a quorum is present), but are they really in session?
Reid was wrong when he did it (ran fake sessions, by calling a nearly empty chamber a session), and now the Republicans are saying it was okay. Nonsense on stilts. Oh well, it's one place where the Republicans and Democrats are in complete agreement - non-sessions are sessions.