There are a number of ways that the effort could run off the rails. First, tax reform is much harder than tax cuts. Second, a few lawmakers have expressed some hesitation regarding the tax legislation itself. Third, there are good arguments against a large net tax cut at the moment, including a high debt-to-GDP ratio, growing fiscal imbalances projected over the coming decade, and an economy with little remaining slack.
http://www.zerohedge.com/news/2017-11-05/goldman-tax-reform-now-comes-hard-part
Realist - Everybody in America is soft, and hates conflict. The cure for this, both in politics and social life, is the same -- hardihood. Give them raw truth.