Fox News anchor Chris Wallace is pushing back on President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE's claim that Democrats are responsible for thousands of migrants headed toward the United States's southern border, calling it "preposterous."

Wallace appeared on Fox News's "America’s Newsroom" on Friday to fact-check the claim, which the president made during a campaign-style rally in Montana the previous night.

“The idea that the Democrats were somehow behind this caravan coming from Honduras of these women and children is preposterous,” Wallace said on the program.

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“These are people that are coming. There are obviously tough conditions both in terms of human rights and in terms of employment in Honduras,” he continued. “Doesn’t mean they have a right to come into the U.S. But this isn’t some Democratic plot.”

Wallace compared the claim to when the president asserted without evidence earlier this month that the hundreds of protesters demonstrating against the confirmation of Supreme Court Justice Brett Kavanaugh Brett Michael KavanaughTrump faces tricky choice on Supreme Court pick The Hill's 12:30 Report: Trump stokes fears over November election outcome The Hill's Morning Report - Sponsored by Facebook - Trump previews SCOTUS nominee as 'totally brilliant' MORE on Capitol Hill were “paid professionals.”

Roughly 4,000 migrants from Honduras arrived at Mexico’s southern border on Friday with hopes of reaching the United States.

Wallace pointed out that similar caravans have traveled across Central America almost every year.

During his rally on Thursday night, Trump accused “crazy Democrats” of being behind the caravan’s formation, claiming "there are those that say that caravan didn’t just happen."

“Now we’re starting to find out, and I won’t say it 100 percent, I’ll put a little tiny question mark at the end … A lot of money’s been passing through, people to come up and try and get to the border by Election Day because they think that’s a negative for us,” Trump said.

“They wanted that caravan, and there are those that say that caravan didn’t just happen, it didn’t just happen. A lot of reasons that caravan — They like it. They also figure everybody coming in is going to vote Democrat. Hey, they’re not so stupid when you think about it right?” he added.

The president said he was willing to send the military down to defend the border because of the “onslaught” of illegal immigrations.