Hillary Clinton Hillary Diane Rodham ClintonJoe Biden looks to expand election battleground into Trump country Biden leads Trump by 12 points among Catholic voters: poll The Hill's Campaign Report: Biden goes on offense MORE's comments about Donald Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE's supporters are proof that she is falling apart, former Speaker Newt Gingrich (R-Ga.) said on Sunday.

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"She just made a statement in which she lumped together millions of Americans," Gingrich said on "Fox News Sunday," referring to Clinton's remark that "half" of Trump supporters fall into a "basket of deplorables."

"Hillary is beginning to fall apart," said Gingrich, an adviser to Trump, the Republican presidential nominee.

Clinton, the Democratic presidential nominee, said Saturday that she regrets calling "half" of Trump supporters deplorable, calling it a "grossly generalistic" comment.

But Rep. Xavier Becerra Xavier BecerraOVERNIGHT ENERGY: Trump casts doubt on climate change science during briefing on wildfires | Biden attacks Trump's climate record amid Western wildfires, lays out his plan | 20 states sue EPA over methane emissions standards rollback 20 states sue EPA over methane emissions standards rollback Investigation underway after bags of mail found dumped in Los Angeles-area parking lot MORE (D-Calif.) defended Clinton on the Fox show Sunday, saying it's clear she's willing to own up to her mistakes, unlike Trump.

"It's clear there's a least one candidate in this race who's willing to say 'I regret a remark I made,' " Becerra said.