I don’t know how to do a timeline of the incident, but I think Rush was a bit late to the game, actually. If I remember right Laura Ingraham on O’Reilly was on it first when it was brought up that Team Obama was trotting her out her testify before congress. Then, Mark Levin really started hammering it.
Neither of the 2 you mention get anywhere near the exposure of Rush. Late to the game or not, it was a whisper until Rush made it a scream.
Again, just my opinion.