The GOP's Extremist Agenda Is Making It Easy For Democrats To Stand Their Ground -- HuffPost

Sixteen years ago, a newly elected Republican president got a huge tax cut through Congress. And he did so with the support of a dozen Democratic senators, most of them politically vulnerable because they came from Republican-leaning states. The mass defection outraged Democratic leaders and grassroots activists, but none of them were really surprised. ....
https://www.huffingtonpost.com/entry/politically-vulnerable-democrats-trump_us_5a1878d0e4b0cee6c04fa04a