Barack Obama has poured cold water on the Hillary Clinton suggestion that the two could form a joint ticket for the November contest, with her leading the charge.
"That may be where this is headed," she said. "But of course we have to decide who is on the top of the ticket. I think the people of Ohio very clearly said it should be me."
Obama has stated quite clearly that he is focussing on securing the nomination himself. And with a lead of at least 90 delegates, that seems quite reasonable.
"We are just focused on winning this nomination," Obama said. "I think it is premature to start talking about a joint ticket."
Obama has also gone on the attack, in response to the negative campaigning by Hillary Clinton in the last week. There was no doubt "...that Senator Clinton went very negative over the last week" and that it has had "some impact" Obama said.
In response to Clinton's 3am ad, Obama specificaly questioned what exactly were her foreign policy credentials. It's a fair question. Clinton has only been a Senator for 2 more years than Obama. Prior to that she was First Lady, where the major decisions were handled by her husband. Or is she claiming something different?
Clinton may have gained some momentum out of her wins in Ohio and Texas - but we can expect to see an even tougher Obama over the coming weeks, with a much more attacking rather than defensive style.