Defense Secretary Pete Hegseth hit the campaign trail on Monday to help former Navy SEAL Ed Gallrein in his bid to unseat Rep. Thomas Massie (R-Ky.) in a GOP primary, a highly unusual move for any head of the Pentagon. Hegseth appeared alongside Gallrein, who President Trump is backing against Massie, at a rally in Hebron, Ky., hosted by the Trump-allied group, America First Works. Coming out to the opening notes of Van Halen’s “Jump,” heavy applause and chants of “USA!”, Hegseth quickly launched into a full-throated endorsement of Gallrein, who he described as a reinforcement to Trump’s agenda. “President...