Is Obama overplaying sequester hand?

Politico reports:

President Barack Obama’s greatest adversary in the latest budget battle isn’t the Republican leadership in Congress — it’s his confidence in his own ability to force a win. He has been so certain of his campaign skills that he didn’t open a line of communication with House Speaker John Boehner and Senate Minority Leader Mitch McConnell until Thursday, a week before the spending ax hits. And when they did finally hear from Obama, the calls were perfunctory, with no request to step up negotiations or invitations to the White House.