Veteran Democratic Party figure George McGovern dropped his support for Hillary Clinton on Wednesday and endorsed Barack Obama, saying the Illinois senator seemed certain to win the party's nomination in November.

U.S. Sen. Hillary Clinton may vow to fight for the Democratic presidential nomination, but some advisers said they think her campaign is on the wane.

While advisers say they are unsure about the New York senator's future, aides to Sen. Barack Obama, D-Ill., say they smell victory, The New York Times reported Thursday.

"We can see the finish line here," said Obama aide David Plouffe after the Illinois senator won the North Carolina primary handily and lost a squeaker in Indiana.

At a campaign stop in West Virginia, with a primary Tuesday, Clinton said she was in the race "until there is a nominee, and obviously I'm going to work as hard as I can to become that nominee."

One Clinton adviser said, at best, there was a 10 percent chance she would drop out before the last primaries June 3, The Washington Post reported.

Tuesday's results and reports she loaned her campaign $6.4 million made her path more difficult.

"It's narrowed," one adviser told the Post.

Clinton lost another supporter when former Sen. George McGovern, D-S.D., switched his endorsement to Obama. He urged Clinton to bow out because it was mathematically impossible for her to capture the nomination. (c) UPI