Newt Gingrich came down on Donald Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE Thursday, saying "little Trump is frankly pathetic."

Gingrich was referring to Trump's attacks on Speaker Paul Ryan Paul Davis RyanKenosha will be a good bellwether in 2020 At indoor rally, Pence says election runs through Wisconsin Juan Williams: Breaking down the debates MORE (R-Wis.) for distancing himself from the Republican presidential nominee just weeks before the election.

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“Donald Trump has one opponent. Her name is Hillary Clinton Hillary Diane Rodham ClintonButtigieg stands in as Pence for Harris's debate practice Senate GOP sees early Supreme Court vote as political booster shot Poll: 51 percent of voters want to abolish the electoral college MORE. Her name is not Paul Ryan. It’s not anybody else,” Gingrich, a Trump adviser, said Thursday morning on Fox Business.

“Look, first of all, let me just say about Trump, who I admire and I’ve tried to help as much as I can. There’s a big Trump and a little Trump,” Gingrich said.

“The little Trump is frankly pathetic. I mean, he’s mad over not getting a phone call?”

Trump at a rally in Florida Wednesday complained that Ryan didn't call and congratulate him after Sunday night's debate against Clinton.

“Instead of calling me and saying, ‘Congratulations, you did a great job, you absolutely destroyed her in the debate like everybody said,’” Trump said.

"So wouldn’t you think that Paul Ryan would call and say, ‘Good going?'"