I've been traveling today, so it's possible someone's beaten me to this. But this strikes me as a very shrewd response by the Obama campaign to questions about McCain's "natural-born" status:

Missouri Sen. Claire McCaskill, a prominent backer of Democratic candidate Sen. Barack Obama, introduced legislation Thursday that would define a "natural-born citizen" as anyone born to any U.S. citizen while serving in the active or reserve components of the U.S. armed forces. Obama's campaign announced late Thursday that he will co-sponsor the bill.

"Those who serve and sacrifice for their country, like John McCain and his father, deserve every honor and privilege that our nation can possibly provide, and that includes the ability to run for the highest office in the land," Obama said in a statement.

There was just no way McCain was going to be denied the presidency on the grounds that he was born in the Panama Canal Zone while his father was stationed there for the military. You might as well take the high ground here, and Obama's done so pretty gracefully (and with some political savvy).

--Noam Scheiber