Former Trump aide: President has 'thick skin’

A former campaign aide to President TrumpDonald John TrumpMLK weekend marks longest span without a press briefing in Trump presidency Giuliani says his comments on Trump Tower talks were 'hypothetical' Mueller coverage keeps missing its mark, as BuzzFeed debacle shows 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 SandersBernard (Bernie) SandersIdentity politics and the race for the Democratic nomination 2020 Democrats barnstorm the country for MLK weekend Bill Maher defends Bernie Sanders campaign over sexual harassment allegations 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 MulvaneyOn The Money: Trump teases 'major announcement' Saturday on shutdown | Fight with Dems intensifies | Pelosi accuses Trump of leaking trip to Afghanistan | Mnuchin refuses to testify on shutdown impacts The Hill's Morning Report — Shutdown fallout — economic distress On The Money: Shutdown Day 26 | Pelosi calls on Trump to delay State of the Union | Cites 'security concerns' | DHS chief says they can handle security | Waters lays out agenda | Senate rejects effort to block Trump on Russia sanctions 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.