The Washington Post is reporting that Senator Clinton is stating flatly that Senator Obama is not ready to be Commander-In-Chief.
http://www.washingtonpost.com/wp-dyn/content/story/2008/02/20/ST2008022002981.html?hpid=topnews
'"One of us is ready to be commander in chief," she told the crowd in New York. "Let's get real. Let's get real about this election, let's get real about our future, let's get real about what it is we can do together."'

I'm thinking that if Obama is the Democratic nominee, it's going to be extremely difficult for Clinton to turn around and endorse him as the best person to be President. She seems to be burning her bridges behind her.