When I first read of a McCain spot on the Democratic ticket, I dashed off a letter to Eric Alterman, the guy who floated it, and told him he was out of his mind. Now I'm not sure. I think if Kerry and McCain both believed that the partisan divide was growing sharp, wide, and dangerous enough to threaten the security of the country (and it is), they would resort to their innate sense of patriotism (NOT politics) and make the ticket happen, regardless of the obstacles (anyone who knows the history of the making of the Kennedy-Johnson ticket klnows that this one would be a snap by comparison).
Anyway, here's a relevant excerpt from today's Boston Globe:
The union of a Democrat and a Republican "would make good on the president's promise to be a uniter, not a divider," said one Kerry aide, who like the others spoke on the condition of anonymity. Such a ticket could offer Americans the prospect of a reduction in the partisanship that has increasingly gripped Capitol Hill during the past decade, as well as a return to the national unity experienced in the aftermath of the Sept. 11, 2001, terrorist attack.
Above all, the aides hypothesize that by choosing McCain as a running mate, Kerry would energize the election, create a weeks-long buzz in the media, and, perhaps most importantly, attract the support of swing and independent voters from both parties. Surveys earlier this year showed that many of the people who supported Howard Dean's insurgent candidacy for the Democratic nomination were the same "McCainiacs" who helped McCain win the 2000 Republican primary in New Hampshire against Bush.
"The narrative fits the country right now," a Kerry aide said of a potential Kerry-McCain partnership
http://www.boston.com/news/nation/articles/2004/04/06/for_kerry_aides_mccain_would_fit_bill_as_running_mate/