Senator John McCain never fails to call himself a conservative Republican as he campaigns as his party's presumptive presidential nominee. He often adds that he was a "foot soldier" in the Reagan revolution and that he believes in the bedrock conservative principles of small government, low taxes and the rights of the unborn.
What Mr. McCain almost never mentions are two extraordinary moments in his political past that are at odds with the candidate of the present: His discussions in 2001 with Democrats about leaving the Republican Party, and his conversations in 2004 with Senator John Kerry about becoming Mr. Kerry's running mate on the Democratic presidential ticket.
There are wildly divergent versions of both episodes, depending on whether Democrats or Mr. McCain and his advisers are telling the story. The Democrats, including Mr. Kerry, say that not only did Mr. McCain express interest but that it was his camp that initially reached out to them. Mr. McCain and his aides counter that in both cases the Democrats were the suitors and Mr. McCain the unwilling bride.
Either way, the episodes shed light on a bitter period in Mr. McCain's life after the 2000 presidential election, when he was, at least in policy terms, drifting away from his own party. They also offer a glimpse into his psychological makeup and the difficulties in putting a label on his political ideology over many years in the Senate.