Senate primaries: How far will Trump go for revenge?
Speculation is growing that President Trump will buck his own party and back primary challengers to two incumbent GOP senators seeking reelection in 2018, an exceedingly rare event that would deepen divisions within a party that is already struggling to govern despite controlling the White House and both chambers of Congress.
The White House is closely watching Senate races in Arizona and Nevada, where Sens. Jeff Flake (R-Ariz.) and Dean Heller (R-Nev.) have attracted pro-Trump primary challengers. A couple of other challengers in Arizona with close ties to Trump are still weighing bids and have visited the White House in recent weeks.
Heller is not close with Trump, although his allies insist he has a good working relationship with the president. Flake is outright hostile to Trump.
The White House is growing tired of the presence of lawmakers it views as insufficiently loyal to the president.
Well see how it plays out, a White House official told The Hill.
http://thehill.com/homenews/campaign/346127-trump-looms-over-primaries-for-flake-heller#bottom-story-socials