In vilifying tweets and speeches, G.O.P. lawmakers who contested the election have far outpaced other Republicans and Democrats in fueling polarization.
Democrats meddled to boost State Senator Darren Bailey in the G.O.P. primary for Illinois governor. But efforts to elevate far-right candidates in Colorado fizzled.
The primary contest between Republican Representatives Mary Miller and Rodney Davis has pitted a hard-right figure styling herself in Trump’s image against a traditional, pragmatic conservative.