Republican fights to survive Trump's wrath in most expensive House primary ever

Rep. Thomas Massie, a Republican congressman who has repeatedly crossed President Donald Trump, is in the fight of his political life to beat back a Trump-endorsed challenger in Tuesday's Kentucky primary.

Massie's race against farmer and former Navy SEAL Ed Gallrein has become the most expensive U.S. House primary on record, with more than $32 million spent on ads. Trump allies and pro-Israel groups critical of Massie have spent big, testing the president's grip on the GOP base and ability to oust conservatives who defy him.