Jodie Foster is on point. Mere minutes into conversation and she’s talking politics, specifically as they pertain to “Money Monster,” a timely thriller she’s directed. It’s impossible to watch “Money Monster,” which stars George Clooney and Julia Roberts and opens May 13, and not be reminded of the indeterminate rage of the Trump phenomenon. She’s eager to talk about “Money Monster,” in which Clooney plays Lee Gates, the swaggering, superficial star of a cable financial show who’s taken hostage by a young man, played by Jack O’Connell, whose savings have been wiped out by one of Gates’s stock tips. Foster...