The Movement: Primaries affirm Trump’s grip on GOP, but key tests are ahead

Some of the biggest primary battles of the year have reaffirmed President Trump’s grip on Republicans, despite the party facing tough midterm odds — but more tests are coming. Trump’s endorsement of Rep. Andy Barr (R-Ky.) for Senate last week, and an apparent offer to businessman Nate Morris to be an ambassador, led to Morris’s prompt withdrawal from the race —…