Talking Points Memo has the text of the press release announcing Senator Tim Johnson’s support for marriage equality:
After lengthy consideration, my views have evolved sufficiently to support marriage equality legislation. This position doesn’t require any religious denomination to alter any of its tenets; it simply forbids government from discrimination regarding who can marry whom.
Quick recap: this only leaves three Democratic Senators who can’t seem to get with the program. Joe Manchin of West Virginia is awful. He’ll hold out until three quarters of the Republican party supports it (surprise me, Senator). Mark Pryor of Arkansas just can’t decide. And finally, Mary Landrieu of Louisiana is just the worst and apparently doesn’t really know where a lot of her (gay) votes come from (New Orleans).