Support WBURLawmakers Don't Have Many Nice Things To Say About Negotiating With Mick MulvaneyPlay03:58Download AudioKelsey SnellJuly 09, 2019 ShareActing White House Chief of Staff Mick Mulvaney, pictured in the Oval Office on May 13, is one of President Trump's closest advisers, but his negotiating tactics aren't widely loved on Capitol Hill. (AFP/Getty Images)