Former Speaker Newt Gingrich said in a new interview that Donald Trump Donald TrumpTrump voters back easing libel laws NARAL president Hogue not running for DNC chair There was record sign-up for ObamaCare, here's why MORE has taken a different tone as president-elect and may be leaving behind his campaign promise to “drain the swamp.”

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Gingrich told NPR's "Morning Edition" that he was told Trump “now says [the phrase] was cute, but he doesn’t want to use it anymore.”

Gingrich, who has been a close adviser to Trump, said he likes "drain the swamp" because it “vividly illustrates the problem, because all people in this city who are the alligators are going to hate the swamp being drained.”

“But, you know, he is my leader and if he decides to drop the swamp and the alligator I will drop the swamp and the alligator,” he added

Gingrich also said he’d also noticed Trump’s change in attitude toward his supporters chanting “lock her up” at his post-election rallies, referring to Hillary Clinton Hillary Rodham ClintonHuffington Post to host DNC chair debate Trump tweets he could have done better in popular vote Gingrich: Trump doesn't want to 'drain the swamp' anymore MORE.

“Maybe he feels that as president, as the next president of the United States, that he should be marginally more dignified than talking about alligators in swamps,” Gingrich said.

During “thank you” tour rallies, Trump acknowledged that his supporters have been more laid back after the election.

"You people were vicious, violent, screaming, 'Where's the wall? We want the wall!' Screaming, 'Prison! Prison! Lock her up!' I mean you are going crazy. I mean, you were nasty and mean and vicious and you wanted to win, right?" Trump said during a stop in Florida last Saturday.

"But now, you're mellow and you're cool and you're not nearly as vicious or violent, right? Because we won, right?"