From the Washington Post:

One Republican lawmaker close to the leadership, who spoke on the condition of anonymity, said GOP leaders have 50 to 60 Republicans on their watch list, with between 40 and 60 expected to break with the White House tomorrow.

Earlier, people were saying 20-60 with Kuhl definitely in play. The closer the estimates get to 60, the more likely it is that Kuhl has decided to vote with the Democrats.

Related posts:

1. Why I think Kuhl will vote with the Democrats for the anti-escalation resolution
2. Newsday says Kuhl still undecided, Walsh to vote for anti-escalation resolution
3. BREAKING NEWS: Kuhl caves in to White House, votes “no” on anti-escalation resolution
4. Kuhl will have a statement up soon on anti-escalation resolution
5. Still no statement from Kuhl on anti-escalation resolution