President TrumpDonald John TrumpTrump second-term plans remain a mystery to GOP Trump to hold outdoor rally in New Hampshire on Saturday Eighty-eight years of debt pieties MORE's daughter-in-law Lara TrumpLara Lea TrumpHillicon Valley: Democrats introduce bill banning federal government use of facial recognition tech | House lawmakers roll out legislation to establish national cyber director | Top federal IT official to step down GOP lawmakers join social media app billed as alternative to Big Tech Trump campaign launches Asian Pacific Americans coalition 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 TrumpHillicon Valley: Democrats introduce bill banning federal government use of facial recognition tech | House lawmakers roll out legislation to establish national cyber director | Top federal IT official to step down GOP lawmakers join social media app billed as alternative to Big Tech Lara Trump: Twitter no longer 'a platform for free speech' 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.