Walton and Johnson have stated on air that they believe their radio show was dropped from Houston airwaves (their hometown, although they are also syndicated in other markets) because of something they said while Obama was coming through town on a fundraiser trip.
If I recall, their show was dropped shortly afterwards (one week after?). They also indicated they believed a local sports franchise owner moved his team’s radio broadcasts to another station in this same action (don’t know if they said the team owner was at the fundraiser or not). It took them several years to return to Houston radio.
I’ve read in the past that Obummer takes pleasure in getting even and believe it.