About this time in the campaign, presidential candidates start to rely on their surrogates. They have done a lot of talking by now, so it’s time to let other big names sing their praises.

But that doesn’t always work out so well. Some surrogates turn out to be less than enthusiastic advocates. Others turn out to be — well, not great. Here’s a look at the worst of the worst.

Dr. Ben Carson
Carson’s most recent slip-up came while interviewing with Denver radio host Krista Kafer. He said he would probably be “Never Trump” if the stakes of losing the election weren’t so high, adding, “A win for the Democrats will just be devastating.”

This isn’t the first time the retired neurosurgeon has questioned his support for the man he is stumping for. He has said Trump has major defects as a candidate, that he wishes he could’ve endorsed someone else, and that Trump is just unprepared when he fumbles interview questions — notably on abortion.

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On a Newsmax TV interview, Carson said definitively that he would serve in Trump’s administration if elected. “I will be doing things as well … Certainly in an advisory capacity” in Trump’s administration, Carson said. “Even if Donald Trump turns out not to be such a great president, which I don’t think is the case, I think he’s going to surround himself with really good people, but even if he didn’t we’re only looking at four years as opposed to multiple generations and perhaps the loss of American dream forever.”

Nice endorsement, Doc.

Sen. Lindsey Graham
Here’s another surrogate who isn’t making gaffes — but who outwardly says he doesn’t like the candidate he supports. Recently, in an interview on “CBS This Morning,” Graham was asked about his support and endorsement of Cruz, who was once a foe. “If I can do it, anybody can do it,” Graham said.

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Previously, Graham said in an interview on MSNBC’s “Morning Joe” that John Kasich would make a better president than Cruz, but that Kasich had no chance. “I have differences with Ted Cruz that are well-known, but I think that we share the same political DNA,” Graham said. “I think John Kasich would be the best nominee but he doesn’t have a chance.”

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Gov. Sarah Palin
Then there’s headline-maker and attention-seeker Sarah Palin. The former governor of Alaska has chosen to support and stump for Trump, but her stump speeches are a total head-scratcher.

Recently, in Milwaukee prior to the Wisconsin primary, Palin stumped for Trump but — oy. Some commentators and reporters took to the airwaves and to Twitter to say that she appeared disoriented and strayed far off topic. “Wisconsin, Reagan saved the hog, here, your Harley Davidson, it was Reagan who saved that,” Palin said.

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In her endorsement speech, Palin took on the Washington, D.C., culture in the only way we have come to expect from Palin. “You know that he doesn’t get his power, his high, off of opium — other people’s money — like a lot of dopes in Washington do,” Palin said. Get it? OPM? Hilarious! Thanks for the backing, SP!

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Bill Clinton
The former president has a gaffe-prone history when it comes to stumping for his wife and has been causing headaches for her campaign.

When Bill spoke at a campaign event for his wife in a predominately African-American neighborhood of Philadelphia, he lashed out at “Black Lives Matter” protesters and activists. “You are defending the people who kill the lives you say matter,” Bill shouted. “You are defending the people who cause young people to go out and take guns.”

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What’s more, Bill called Obama’s policies “awful” at a campaign stop for Hillary in Washington State. “If you believe we’ve finally come to the point we can put the awful legacy of the last eight years behind us and the seven years before that where we were practicing trickle-down economics, then you should vote for her,” he said.

The Clinton campaign then had to quickly cover up and backtrack the comments, sinceHillary has hitched her wagon to the legacy of Obama — her former boss.

Thanks, Bubba.