This just in from Justin Taylor's blog:
"NR has learned that the McCain campaign has been calling key state GOP officials around the country the last couple of days and sounding them out about the consequences of a pro-choice VP pick. The campaign is asking about the reaction of conservative grass-roots activists to such a pick and whether a pro-choicer can be sold to them. This is an indication that the McCain campaign is serious about the possibility of a pro-choice VP nominee and that McCain leaving the door open to Tom Ridge last week may not have been merely a friendly nod to a longtime supporter. In this scenario, McCain's emphatic pro-life statements Saturday night and his pledge that he'll run a "pro-life administration" would have been partly an attempt to reassure conservatives in the event of a pro-choice pick."