PROVO, Utah — Accused Charlie Kirk assassin Tyler Robinson returns to a Utah courtroom Tuesday for a hearing that could send his case to trial or dramatically reshape it, with a judge to weigh whether prosecutors have shown enough probable cause to support the aggravated murder charge that puts the death penalty on the table — and the suspect may finally be asked to enter a plea nearly a year after the slaying. Robinson, a 23-year-old from Washington, Utah, is accused of firing a single shot that killed the 31-year-old father of two during a Turning Point USA event at...