Well, from the McCain campaign's public record:
Senator McCain was meeting with economic advisers and talking to leaders in Congress throughout the day prior to calling Senator Obama.
And this from the Politico:
The McCain campaign's new urgency about the financial crisis didn't entirely clear his schedule this morning. My colleague Amie Parnes reports that he made it to his scheduled morning meeting with Lady Lynn de Rothschild, a Clinton backer who recently came out in support of him.
If the Politico is correct, then the McCain campaign just put out a bald-faced lie. This kind of demonstrable lie can now be shown beyond any doubt in Palin's public statements at least twelve times.