Late-night show hosts have become something of a national conscience for liberal-leaning Americans, and at the forefront is Trevor Noah. A comedian who was a relative unknown when he took the reins of “The Daily Show” after Jon Stewart’s departure in 2015, Noah has ripped into President Trump on issues ranging from immigration to police brutality, and more recently set his sights on the men who have been repeatedly accused of sexual harassment and assault — all with a wit that keeps audiences laughing rather than crying. Now, he’s bringing the laughs to San Francisco for multiple engagements at the Masonic this weekend.