What's the Matter with Texas?

Dubya's popularity is a scant 39%, though that still makes him more popular than Landslide Perry who is now hovering at 34%. And Cornyn holds only a four point lead on Rick Noriega. And both Obama and Clinton are polling at 43%, to McCain's 48% (against Obama) and 49% (against Clinton). Given that Rasmussen has always had a tendency to skew Republican, this is potentially very explosive stuff. Texas hasn't really been in play in a Presidential election since 1976, though the potential was there in 1996 had Bill Clinton not blown the state off. If even Texas is looking a little purple, then McCain is in serious, serious trouble.

UPDATE: A Research 2000 poll seems to confirm the Rasmussen results. So what gives? Neither Cornyn nor Kay Bailey Hutchinson have gotten just huge amounts of coverage lately, yet her approval ratings leave his in the dust, so it's hard to write this off as the Dubya anchor dragging down all GOP boats. Could it be that after a decade-long deathgrip on statewide office and the Legislature, the Republican brand name has fallen so far that it's Hutchinson who's the exception and Perry and Dubya the rule?