Trump-backed nominees dominate primary contests as president tightens party vice grip

President Donald Trump was the biggest winner of Tuesday’s wide slate of primary elections as the president celebrated a large swath of his preferred candidates winning GOP primaries or advancing to runoff elections. 

In the most expensive primary in U.S. House history, a longtime thorn in Trump’s side, Rep. Thomas Massie, R-Ky., lost to former Navy SEAL Ed Gallrein in Kentucky’s 4th District. Gallrein defeated Massie soundly with nearly 55% of the vote to Massie’s 45.1%, according to The Associated Press.