Steve Rattner, Willett Advisors' chairman, says Trump isn't interested in advice or suggestions in running his White House. Prior to that, Mario Gabelli, Gabelli Funds' CIO of value portfolios, says American companies will get tailwinds as opposed to headwinds. Douglas Elmendorf, the dean of Harvard's Kennedy School, says it's important for GOP leaders to stand up for the CBO and its work. Brian Wieser, a senior research analyst at Pivotal Research Group, says Fox is undervalued. Finally, Martin Sorrell, WPP's CEO, says businesses have yet to see the effects of U.K. uncertainty.