Sen. Bernie Sanders Bernie SandersMcConnell accuses Democrats of sowing division by 'downplaying progress' on election security The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters Why Democrats must confront extreme left wing incitement to violence MORE (I-Vt.) on Monday mocked President Trump's claim that "nobody knew that healthcare could be so complicated," saying he hopes Trump and the GOP will move past campaign rhetoric and start working on a solution.

In a CNN interview, Sanders laughed out loud when host Anderson Cooper brought up Trump's statement earlier Monday on his plan to replace ObamaCare.

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"Some of us who were sitting on the Health Education Committee who went to meeting after meeting after meeting, who heard from dozens of people and stayed up night after night trying to figure out this thing. Yeah, we got a clue," Sanders said.

"When you provide healthcare in a nation of 320 million people, yeah, it is very, very complicated."

Trump and Republicans campaigned on a pledge to repeal and replace ObamaCare.

Trump on Monday said after a meeting with conservative governors at the White House that “there’s nothing to love” about ObamaCare, calling it “a disaster.” He dismissed polls that show support for ObamaCare is at an all-time high.

But he acknowledged, “I have to tell you, it's an unbelievably complex subject.”

Sanders in his interview slammed Republicans for grandiose promises, mockingly quoting them as saying, "We're gonna repeal ObamaCare, and everything will be wonderful."

"It's a little bit more complicated than that," he joked.