Do political endorsements matter to voters?

Republican presidential candidate Donald Trump, accompanied by New Jersey Gov. Chris Christie, left, and seen through a chandelier, speaks during a news conference on Super Tuesday primary election night in the White and Gold Ballroom at The Mar-A-Lago Club in Palm Beach, Fla., Tuesday, March 1, 2016. (AP Photo/Andrew Harnik)

Endorsements can help voters who haven't deeply considered the candidates. But they can just as easily backfire for the endorsers and endorsees.

Chris Christie might be having some regrets.

The New Jersey governor Chris Christie threw his support behind Donald Trump last week after dropping out of the presidential primary battle.

But there's a video of him standing behind Trump on stage earlier this week with a look in his eyes that's been described as "troubled," "miserable" and "wordlessly screaming."

via GIPHY

Meanwhile, former GOP presidential candidate Mitt Romney came out with a sort of anti-endorsement of Trump, calling him a phony and fraud.

But do these endorsements truly that much in a campaign? Trump seems to be doing just fine without them.

Thad Kousser, professor of political science at UC-San Diego, joins Take Two.