Former Trump aide: President has 'thick skin’

A former campaign aide to President TrumpDonald John TrumpGOP senator introduces bill to hold online platforms liable for political bias Rubio responds to journalist who called it 'strange' to see him at Trump rally Rubio responds to journalist who called it 'strange' to see him at Trump rally 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 SandersFive takeaways from Trump's 2020 kickoff rally Five takeaways from Trump's 2020 kickoff rally Sanders tears into Trump in response to campaign kickoff rally 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 MulvaneyJohn (Mick) Michael MulvaneyCongressional leaders, White House officials to meet Wednesday on spending Congressional leaders, White House officials to meet Wednesday on spending The Hill's 12:30 Report — Presented by MAPRx — Supreme Court double jeopardy ruling could impact Manafort 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.