We'll see. If Obama can marginalize Rush, then Obama is ahead. On the other hand, Ed Morrissey thinks Obama both foolish and unpresidential to single out Rush. Morrissey explains:
Instead of marginalizing Rush Limbaugh, Obama managed to make him the most credible voice of opposition. . . It [Obama's attack] demonstrates that Obama still has no sense of his office, nor of “post-partisanship”, regardless of his endlessly empty rhetoric on the subject.
George Bush never attacked Keith Olbermann, Chris Matthews, or other voices of the rabid Left by name. If he ever went on the attack against the left-wing media, he kept the attack general and broad, rather than specific. Bush may not have been the most media-savvy of our modern presidents — in fact, he may have been the worst at it since Nixon — but he knew enough about his office to understand that part of its strength would keep him somewhat above the partisan-pundit fray. Obama hasn’t figured that much out yet.
Thanks to this attack, Rush not only has his own megaphone, but he gained everyone else’s for a brief time. He became a national story, gained national coverage, and in general got a million dollars’ worth of free publicity. And Rush knows how to use it to his advantage . . Obama made Rush's megaphone even bigger.