They claim the McCain campaign was informed last week.

Senior McCain campaign officials said McCain knew of the daughter's pregnancy when he selected Palin last week as his vice presidential running mate, deciding that it did not disqualify the 44-year-old governor in any way.

But no one thought it relevant to tell Palin's own spokesman. Uh huh. From TPM Election Central:

The Daily News had asked Palin's press secretary, Bill McAllister, over the weekend to address rumors that Bristol was pregnant.

"I don't know. I have no evidence that Bristol's pregnant," he said on Saturday.

As Joe notes below, it's all very Jerry Springer meets Desperate Housewives. Or should I say, Desperate Republicans.