Can House Speaker Paul Ryan herd enough House cats in a tax bill that's also acceptable to the Senate?

The Wall Street Journal reports Republicans' Tax Overhaul Likely to Face Its Own Slings and Arrows.

Treasury Secretary Steven Mnuchin said Friday that a tax bill would be "a lot simpler" than a health-care overhaul. "There is very, very strong support."

But scratch deeper, and the GOP quest for a full overhaul of the tax code is fraught with squabbles, procedural hurdles and difficult trade-offs. The party's failure on health care—after having seven years to prepare—shows how hard it is for Republicans to write complex legislation that attracts support from their moderate and conservative wings.

"It's just a reminder of how incredibly hard transformational legislation is," said John Gimigliano, a former GOP congressional tax aide now at KPMG LLP.