Americans for Prosperity President Tim Phillips said "now is the critical moment for transformative tax reform ... so we are encouraging members and the administration to go all-in on this and get a major piece of legislation passed in 2017." But Republicans are now stuck dealing with tax reform and health care at once, with an expected vote on the Graham-Cassidy bill next Wednesday — during the same week the admin is supposed start their tax reform rollout.

Go deeper: The Graham-Cassidy bill could delay tax reform if the admin decides to push the tax rollout to the first week of October, devoting time (and attention) to health care this month.