With President Obama and Mitt Romney hunkered down in debate prep, their surrogates took to the airwaves today, as did Steven Colbert, both in and out of character, reports Politico. Assessing Romney's post-debate trajectory, Colbert quipped, "He is on a rocket ride to plausible at this point." He later turned serious in breaking down differences between the two candidates, saying Obama might be "a more aggressive reformer" in his second term, while Romney "might govern as a technocrat." But "he can't tell us what he's gonna do, 'cause he hasn't seen the books yet." If Romney wins, "I hope he's a good president." As for Obama, "I hope he keeps some of the promises he didn't keep the first time." Other highlights from around the Sunday dial, as per Politico: