Speculation about who Sen. John McCain will pick as his vice presidential running mate reached a fever pitch today as all signs pointed to an answer coming as soon as tonight.

The top possibilities continued to be former Massachusetts governor Mitt Romney, Minnesota Gov. Tim Pawlenty and Connecticut Sen. Joe Lieberman. Other names included former Pennsylvania governor Tom Ridge and Texas Sen. Kay Bailey Hutchison.

One senior Republican who has talked personally with Romney, Ridge and Pawlenty during the past two days said none of them had been told yet by McCain.

“All of them believe that it’s not them,” the GOP source said.

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