While Tuesday's thorough drubbing in West Virginia will undoubtably stings Obama, Clinton continues to trail him in pledged delegates and superdelegates, and her campaign continues to bleed money.
"The dynamic of the race have become such that her win today doesn't necessarily change the playing field that much given the few number of delegates at stake," said Democratic strategist Paul Brathwaite. West Virginia had 28 delegates up for grabs.
Clinton Victory May Fuel Electability Argument
While Clinton will speak shortly at a victory party in Charleston, West Virginia, Obama traveled to the traditional general election state of Missouri to demonstrate he is already focused on the general election.
"This is a state where we will compete to win when I am the Democratic nominee for president," Obama told supporters tonight at Cape Girareau Town Hall in Missouri.
"There is a lot of talk these days about how the Democratic Party is divided. But I'm not worried, because I know that we'll be able to come together quickly behind a common purpose. There's too much that unites us as Democrats. There's too much at stake for our country," Obama said.
However Clinton's victory in West Virginia may fuel her argument that Obama isn't a viable general election candidate. The Mountain State has many of the white, Southern, rural, older, low-income and low-education voters who have flocked to Clinton's presidential candidacy in previous contests.
In a trouble sign for Obama, barely half of lower-income, low-education voters in the state said they'd vote for him in November if he's the party's nominee, according to preliminary exit poll results..
Perhaps suggesting an economic voting divide, Clinton voters were more likely than Obama supporters to say the economy was hurting their families a lot.
And, racially motivated voting appears to be running higher than usual, preliminary exit poll results suggest, with two in 10 white voters saying the race of the candidate was a factor in their vote. About 66 percent of those voters said they wouldn't support Obama in the general election against presumptive Republican nominee Sen. John McCain, R-Ariz.
Blue Collar Clinton
The demographics in West Virginia heavily favored Clinton, who has rebranded herself during the course of the campaign as a tireless champion of blue collar workers.
West Virginia is 95 percent white, has the highest percentage in the nation of people without a college education, and the second-highest percentage of older Americans, after Florida.
Adding to her electability argument, Clinton repeatedly reminded voters over the last week that no Democrat has won the White House since 1916 without winning West Virginia, a state that voted for former President Clinton in 1992 and 1996 but voted for President Bush in 2000 and 2004.
The Clintons made 30 campaign stops in West Virginia, while Obama made three. The former president's efforts may have paid off. A large majority of Clinton voters said former President Bill Clinton's campaigning was important to their vote, preliminary exit poll results suggest.
Clinton Win May Slow, Not Stop Obama's Path to Nomination
Despite her victory today, Clinton continues to lag behind Obama in delegates, momentum, and money.
Her campaign debt is estimated to exceed $20 million and could go deeper as she campaigns through the final primaries June 3.
Obama Eyes McCain
Though the Democratic contest does not officially end until June 3, the Illinois senator has increasingly begun to focus his campaign on the general election.
This week he announced plans to visit important swing states Michigan and Florida -- which were stripped of their delegates to the party's convention this August in Denver after breaking party rules by moving their primaries ahead on the calendar.
While Clinton is facing increased pressure to drop out of the race, her senior adviser Terry McAuliffe told ABC News he is "100 percent" certain she will stay in the race until the last primaries in Montana and South Dakota June 3.
But Obama said this week the nomination fight may be over May 20, if his expected win in Oregon gives him a majority of pledged delegates.
Despite the bitter campaign and rumors of animosity between the candidates, the rivals were cordial when they both found themselves both on the Senate floor on Capitol Hill Tuesday morning.
Obama walked over to Clinton to shake her hand and pat her on the arm. Later, Clinton traveled to Charleston, West Virginia where she toured a farmer's market and shook hands with voters.
However political watchers
POLL: Most Dems Support Clinton Staying in the Race
Despite Obama's insurmountable delegate lead, Clinton's continued presence in the race doesn't bother a majority of Democrats.
While most Democrats favor Obama for the nomination, 64 percent of likely Democratic voters believe she should stay on and fight, according to an ABC News/Washington Post poll released Monday.
"As long as she's not dividing the party deeply by going after Sen. Obama and questioning his capacity to be president, attacking him on issues, running negative ads like the 3 a.m. ad, then I think she's fine and not damaging herself within the Democratic Party and certainly not damaging herself with voters," Devine said.
By staying in the race and continuing to win states, Devine argued, Clinton may enhance her image and close the gap in the popular vote.
"This process has been good for her, even though she is ultimately going to lose it," he said.
"That identity of fighting for people and the perception that she doesn't give up will serve her well in politics, particularly if there's some tough fights ahead like passing national health insurance, which she may take a leadership role on," Devine said.
However, the longer Clinton stays in the race, the deeper her campaign goes into the red. Her campaign debt is estimated to exceed $20 million and could go deeper as she campaigns through the final primaries June 3.
And, as long as Clinton continues to stay on and win on, she can raise questions about Obama's electability in the general election among demographics groups who continue to support her.
ABC News' Gary Langer, Z. Byron Wolf, Ann Compton, Teddy Davis, and Eloise Harper contributed to this report.