I'm really unsure of what to make of this
Sure, Reagan was an actor, but then he became president
Obama is president, and goes on late night pseudo-news, on the COMEDY Channel
Obama, Jon Stewart and Change - NYTimes.com:
"Late-night television has come a long way since Bill Clinton, then a presidential candidate, played his saxophone for Arsenio Hall during his campaign for the White House in 1992. The lines between entertainment and news are increasingly blurred – in part because Mr. Obama has been willing to bring his presidential platform to settings his predecessors might have regarded as unconventional, to say the least."