India, May 20 -- Donald Trump-backed candidates scored major wins in Tuesday's primaries across six states. The biggest upset came in Kentucky, where Rep. Thomas Massie lost to Trump-endorsed Ed Gallrein in a costly GOP House primary. Rep. Andy Barr also secured the Republican nomination for Kentucky's open Senate seat.

Democrats had a smoother night. In Georgia, former Atlanta Mayor Keisha Lance Bottoms was projected to win the Democratic nomination for governor. On the Republican side, Burt Jones and Rick Jackson were projected to advance to a runoff after neither appeared likely to cross the 50% threshold.

In Pennsylvania, the governor's race is officially set: Democratic Gov. Josh Shapiro will face Republican State Treasurer Stacy G...