At a minimum they need to pass the denial bill and make obama veto it.
An unlikely scenario but would be fun to imagine:
vote the deal down with simple majority
then send 3 dems to Iran to assure the iranians they are
still on the islamist side
then have some special ops from a foreign nation that does NOT approve, say the Saudis, hold them for questioning until after the veto override is scheduled by the senate
then overturn the veto with three of the wack jobs languishing somewhere in Pakistan
97 senators is more than enough for a quorum call.
the good guys will call the tune... overturn the veto and then call the Pakis to LET OUR PEOPLE GO!
we got to start thinking outside the box (remember when a large group of democrats all left the state to stop a quorum call, while they were in the minority?)
YES, DEMS think like that...ALL THE TIME.