Former Trump aide: President has 'thick skin’

A former campaign aide to President TrumpDonald John TrumpProtesters tear down statue of Christopher Columbus in Baltimore 'Independence Day' star Bill Pullman urges Americans to wear a 'freedom mask' in July 4 PSA Protesters burn American flag outside White House after Trump's July Fourth address MORE who's now a CNN contributor earned pushback during a panel discussion on Sunday when he said the president "has pretty thick skin."

CNN host Jake Tapper and other contributors on the panel interrupted when David Urban said, "I'm sure the president knows that people say bad things about him. He's got pretty thick skin."

"The thinnest skin I've ever seen," objected Symone Sanders, former press secretary for Sen. Bernie SandersBernie SandersThe Memo: Unhappy voters could deliver political shocks beyond Trump Democratic senator will introduce bill mandating social distancing on flights after flying on packed plane Neil Young opposes use of his music at Trump Mount Rushmore event: 'I stand in solidarity with the Lakota Sioux' MORE's (I-Vt.) 2016 presidential campaign.

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"He's a tough guy, he can take it," Urban maintained, despite the outburst during the panel discussion of Mick MulvaneyMick MulvaneySupreme Court ruling could unleash new legal challenges to consumer bureau Bottom line White House goes through dizzying change in staff MORE, Trump's choice to be his acting White House chief of staff.

Comments Mulvaney made during the presidential campaign in 2016 have resurfaced since Trump's Friday announcement about Mulvaney, including one clip in which the former congressman said he supported Trump despite the fact that he's "a terrible human being."

Urban, who worked on Trump's 2016 campaign as an adviser, dismissed the idea that Trump hasn't seen the negative comments from Mulvaney.