NBC personality Savannah Guthrie sounded off about the hiring and firing of RNC chair Ronna McDaniel after her short tenure sparked backlash from staffers, RadarOnline.com has learned, revealing that network brass “acknowledged a mistake, and we moved on.” Guthrie was grilled by Late Show host Stephen Colbertabout the recent controversy while promoting her new book on Tuesday. Colbert joked that she recruited McDaniel herself. “I want you to answer for your crimes,” he quipped. “Why did you think that was the best idea?” The longtime journalist thanked Colbert for giving her a platform to disc…