DENVER (CNN) - Claire McCaskill’s from Missouri - a near-perfect bellwether state. It’s partly Southern, partly Northern, partly urban, partly rural. A key battleground state in this election, it’s voted for the winner in the every single election of the past century but one - why it voted for Adlai Stevenson in 1956, I have no idea. And of course, she’s a woman who endorsed Barack Obama over Hillary Clinton. She’s using feminist themes against John McCain.