Kentucky Sen. Rand Paul says he won't support the massive budget bill, which will lead to another government shutdown.
Paul is a known fiscal hawk. He made it clear he opposes the more than 600-page funding bill that raises domestic and military spending by around $300 billion and lifts the debt limit until March 2019.
And, due to Senate rules, all 100 have to agree to actually vote on it. He's refusing to vote on the bill unless he gets 15 minutes to debate an amendment to reinstate budget caps set in 2011.
But government funding expires Thursday at midnight. If party leaders ignore Paul's request, they can't call a vote until 1 a.m. Friday morning without Paul's support.