(Reuters) – Stephen Colbert dropped in on David Letterman’s late night CBS talk show, the “Late Show” on Tuesday, to get a glimpse of the rigors of the high-profile job he will take over in 2015. “He just stopped by to sign the lease,” Letterman said of his successor in his opening monologue. Continuing the passing-of-the-torch theme, the host quipped, “You look right at home,” as Colbert took his seat. In a nod to Letterman’s […]