John McCain and Mitt Romney are getting in their final shots. McCain puts out a radio ad going after Romney on his Massachusetts record and his electability. (On the latter point, McCain holds a substantial advantage, which is something many conservatives are mulling over.) Romney supporters are circulating a John Fund report that certain (unidentified) conservatives said that McCain said in a private meeting he would not favor a Supreme Court Justice like Samuel Alito. McCain advisor Steve Schmidt denies McCain said it. It would seem odd for McCain, even if he believed such a thing, to have made the comment. He did, as Schmidt points out, strongly support Alito in his confirmation fight. Does any of this matter? I think back-and-forth spitballs the day before an election don’t matter very much. Crist-mentum may.

UPDATE: McCain has responded in clear terms to the “He doesn’t like Alito” attack here and here. Of all the accusations his conservative opponents could have made on the final day of the Florida campaign, this seemed to be one of the weakest and least credible.