President TrumpDonald John TrumpTrump reversed course on flavored e-cigarette ban over fear of job losses: report Trump to award National Medal of Arts to actor Jon Voight Sondland notified Trump officials of investigation push ahead of Ukraine call: report MORE's daughter-in-law Lara TrumpLara Lea TrumpTrump feud with Minneapolis mayor to take center stage at rally The Hill's 12:30 Report: Biden expands lead in new national poll Eric, Lara Trump welcome second baby MORE remarked Thursday that German Chancellor Angela Merkel's decision to allow migrants into the country was "one of the worst things that ever happened to Germany."

“When there was a march across Europe by a million people who wanted to get into Western Europe, Angela Merkel let them in,” Fox Business host Stuart Varney said during an interview with Lara Trump, an adviser on President Trump's reelection campaign, on the network.

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“It was the downfall of Germany, it was one of the worst things that ever happened to Germany,” Trump responded. “This president knows that, he’s trying to prevent that from happening here.” 

Trump, who is married to the president's son Eric TrumpEric Frederick TrumpResistance or unhinged behavior? Partisan hatred reaches Trump's family The Memo: Debate over style vs. substance shadows impeachment hearings Trump hotel sales brochure touts 'tremendous upside potential' of government-related business: report MORE, made the remark as part of a discussion about a migrant caravan that Varney said is headed toward the U.S.-Mexico border. He said that the footage of the migrants reminded him of migrants moving through Europe.

Germany accepted more than 1 million refugees in 2015 during what Merkel called "extraordinary" circumstances following major conflicts in Syria, Iraq and Afghanistan.

President Trump went after Merkel's immigration policies during the 2016 presidential race, at one point calling them "insane" and accusing her of "ruining Germany." The pair have had an at-times strained relationship over other issues such as tariffs, a gas pipeline with Russia and the Iran nuclear deal.

Trump is known for his hard-line stance on immigration, and earlier this year he sparked controversy when he declared a national emergency to reallocate funding for his long-proposed wall at the U.S.-Mexico border after Congress refused his funding demands.