Friday on the NewsHour, Gov. Chris Christie endorses Donald Trump hours after a contentious debate that saw rivals taking aim at the GOP frontrunner. Also: Clinton and Sanders battle for black votes in South Carolina, Shields and Ponnuru talk the week in politics, Iran’s moderates hope for big election gains, an all-white Oscars ceremony draws racial scrutiny and Obama rocks out to Ray Charles.

The show’s own verdict is on its page.