Donald Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE is wading into a potential 2018 Republican Senate primary fight in Texas, saying former Gov. Rick Perry is a "popular guy" and would "do well" if he were to challenge Sen. Ted Cruz Rafael (Ted) Edward CruzMurkowski: Supreme Court nominee should not be taken up before election Battle lines drawn on precedent in Supreme Court fight Sunday shows - Ruth Bader Ginsburg's death dominates MORE.

"I’ve been hearing a lot about that, and I don’t know if he wants to do it, but boy, will he do well. People love him in Texas, and he was one great governor," Trump, the Republican presidential nominee, said Tuesday during a fundraiser in Austin, Texas, that Perry also attended.

ADVERTISEMENT

The billionaire's comment about a potential primary fight between Cruz and Perry was posted online Wednesday by the Lone Star Project, a Democratic group.

Trump — who didn't criticize Cruz or specifically back Perry — said that while he doesn't know Perry's plans, he is "one popular guy all over, but in Texas in particular."

His remark comes a week after the Democratic-leaning Public Policy Polling released a survey that had Perry beating Cruz in a hypothetical primary match-up by 9 percentage points.

Cruz isn't up for reelection unit 2018, but speculation is mounting that he'll face a primary fight after he refused to endorse Trump during his speech at the Republican National Convention in Cleveland last month.

In response, Trump floated starting a super-PAC to defeat his former presidential rival after the two men traded increasingly personal barbs as they fought for the GOP's presidential nomination.