It was supposed to be a routine appearance, a visit from the commander in chief to rally the troops, boost morale and celebrate the Army's 250th-birthday week, which culminates with a Washington, D.C., parade slated for Saturday. Instead, what unfolded Tuesday at Fort Bragg, North Carolina, bore little resemblance to the customary visit from a president and defense secretary. There, President Donald Trump unleashed a speech laced with partisan invective, goading jeers from a crowd of soldiers positioned behind his podium -- blurring the long-standing and sacrosanct line between the military and partisan politics. As Trump viciously attacked his perceived...