Trump owns the GOP. Could Republicans pay the price in the midterms?

President Trump successfully backed all 37 GOP primary candidates he endorsed, including Ed Gallrein's victory over Rep. Thomas Massie in Kentucky's 4th Congressional District. Trump's dominant influence over the Republican Party raises concerns about potential repercussions in the midterm elections. Republicans worry that Trump's primary victories and purges of dissident lawmakers could harm their chances of defending their congressional majorities in the fall.