Sen. Rand Paul tweeted a shot across the bow to Congressional Republicans over the GOP tax plan this afternoon:
Why it matters: Republicans can only afford to lose three votes on tax reform, and retiring Sen. Bob Corker has made it clear that he won't vote for a bill that increases the deficit. Now, Paul's tweet only complicates the matter further — and puts the pressure on Mitch McConnell to deliver a final bill that's acceptable to his members.