Brian Steinberg Senior TV Editor Mick Mulvaney, the former Director of the Office of Management and Budget acting White House Chief of Staff during the Trump administration, has been named a contributor to NewsNation, the upstart cable-news service operated by Nexstar Media. Mulvaney, who has left a contributor role at CBS News, is expected to take up his new duties immediately, appearing on the new politics-roundtable program “The Hill” at 5 p.m. Tuesday. “Mick’s enormous experience in the political sector will make him an incredible resource to viewers,” said Michael Corn, president of news at NewsNation, in a statement. “We are excited to welcome him to our growing powerhouse team of political analysts, especially as we enter another important election season.”