The slow trickle of votes continuespublished at 19:20 Greenwich Mean Time 7 February
Votes are still coming in - slowly, as you can probably tell by now.
It's a very subdued scene, with just a few senators on the floor at any given time as others trickle in to cast their votes.
So far, 31 senators have voted "yes" to advance the bill, and 11 have voted "no".
To advance, the motion will need another 29 votes.