White House hopeful Barack Obama believes he is on the brink of eliminating Hillary Clinton from the Democratic fight as their exhausting primary season heads to a climax next week.Party leaders including House of Representatives Speaker Nancy Pelosi and Senate majority leader Harry Reid said Thursday the race would be wrapped up soon -- and dropped every hint that Obama would emerge as the victor.But ahead of Sunday's primary in Puerto Rico, and the final contests in Montana and South Dakota on Tuesday, Clinton's campaign was adamant she remained the better bet to take on Republican John McCain."Obviously, it's not over until we get to the convention or until Senator Clinton makes the decision that she's now prepared to support a unified ticket," former Senate majority leader Tom Daschle told MSNBC television.