From what I understand, Harry Reid (who brought up the DISCLOSE Act in the Senate in the first place) voted against it just so he could bring it up again later in some weird Senate loophole. So while this would be great, it's literally just a political stunt.
The first time I saw that done was in 2006 when Bill Frist put forward a bill that combined a minimum wage hike, repeal of the estate tax and some sort of pension reform bill. It got 56 votes or so and Frist changed his vote to Nay at the last minute so he could "bring it up again". He never did.
