The 2018 election will be Trump vs the Senate. Anyone who does not sign onto the Presidents agenda is going to be challenged, whether the incumbent is a Dem or Republican. Americans are seeing major economic achievements in just 9 months. They want Trumps tax cuts and job growth and those Republicans who wont support this growth agenda need to be toppled.
flake opposed trump....flake gone
corker opposed trump .... corker gone
hmmmmmm a pattern is developing....