Former Speaker Newt Gingrich (R-Ga.) said on Sunday that Republicans must choose between helping their presumptive presidential nominee, Donald Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE, or supporting Democratic front-runner Hillary Clinton Hillary Diane Rodham ClintonWhat Senate Republicans have said about election-year Supreme Court vacancies Bipartisan praise pours in after Ginsburg's death Trump carries on with rally, unaware of Ginsburg's death MORE.

ADVERTISEMENT

In a radio interview with John Catsimatidis, the former Speaker was asked about Sen. Ted Cruz Rafael (Ted) Edward CruzSenate Republicans face tough decision on replacing Ginsburg Cruz: Trump should nominate a Supreme Court justice next week Renewed focus on Trump's Supreme Court list after Ginsburg's death MORE (R-Texas) flirting with the idea of restarting his presidential campaign.

“I mean I just think — I don’t know what Ted was thinking of,” Gingrich said. “To me, it’s pretty clear that this is over. Trump is the nominee. That’s why I disagreed with [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.]. I thought that the moment to say, ‘OK, we have the leader of the team, let’s pull the team together, let’s go beat Hillary,’ has arrived.

“You’re either for Hillary Clinton or you’re for Donald Trump. If you’re not for Donald Trump, you are functionally helping Hillary Clinton. I think it’s just that straightforward.”

Gingrich’s comments come as a rebuke to Republicans who are rumored to be exploring the possibility of a conservative third-party candidate to block Trump from taking the White House.