I don't know if Bush won "because of" the swift boat attacks, however those attacks certainly knocked Kerry down from the war-hero-absolutely-wonderful-human-being-who-can-do-no-wrong image that the press portrayed of Kerry. The press downplayed, if they at all mentioned, Kerry's despicable behavior once he got home (falsely accusing troops of atrocities, throwing his medals off a bridge, etc)
Obama is a radical and his past before becoming President showed it. He is the combination of radical left college professor and Chicago politician. We need to break down this Nobel-Prize-winning-savior-of-the-world view that left wing institutions have created of Obama. Romney should have done it.