[chaosagent]

Don't think Rush's "insecurity" has any thing to do with.

I doubt Rush feels threatened at all.

I would be willing to bet that the syndicator's don't want it because due to tape delay broadcasting, time zones, etc., there's a real possibility that Medved could be competing with himself.

[soccermom]

No -- Medved had said on his own show that he still wanted to guest-host for Rush, but Rush won't do it. If you notice, Hannity doesn't fill in for him anymore, either. It is understandable that a host wouldn't want to promote potential "competition."