[Jorge]

...in any case Toomey is more electable than Specter so if that is the concern you should vote Toomey.

Why then are Bush and Santorum endorsing Specter and not Toomey?

[WOSG]

"Why then are Bush and Santorum endorsing Specter and not Toomey?"

Specter is the incumbent. and Santorum's colleague. Reason #1 #2 #3. ... The head guy supports the incumbent by default.

Imagine if roles were reversed: Toomey was running again and a pro-choice RINO were running against Toomey.
Who'd support such a flaky candidate like Specter then?

I also think there is an establishment bias against conservatives, if you notice Karl Rove does backflips for RINO and moderate Senates candidates but give conservatives the back of his hand. Dumb mistaken political calculation over principles.