Trump’s fissure with Senate Republicans could blow up in Arizona

In Arizona, the president’s wealthiest allies are pouring in hundreds of thousands of dollars into efforts to unseat Sen. Jeff Flake, an outspoken, conservative Trump critic. Those resources may not be enough, as it’s unclear if Flake’s challenger has the political prowess or campaign architecture to unseat the freshman incumbent.

That is, unless Trump himself intervenes.

The president has pondered backing Flake’s challenger, former state senator Kelli Ward, and has even privately floated the possibility of putting millions of dollars in his own money behind her primary challenge. It would be a stunning move against a sitting lawmaker of Trump’s own party. But the president is already heading in that direction.