Texas Sen. Ted Cruz (R), Kentucky Sen. Rand Paul (R) and Florida Sen. Marco Rubio (R) have been mum in private meetings, giving little hint to their rivals on whether they will vote for the budget’s final passage. Sen. Lindsey Graham (R-S.C.), the fourth GOP senator expected to pursue a presidential bid, says he will vote “yes.”

Senate Majority Leader Mitch McConnell (R-Ky.) can afford only three defections, or the budget will fall short. Every Democrat is expected to vote “no.”

Cruz and Paul have also kept what amendments they will offer a secret.

“As a matter of fact, they’re very quiet in all of our meetings. I think they’re trying to figure out where they’re going to be,” said a GOP senator, who requested anonymity to comment on internal discussions.