STERLING HEIGHTS, Mich. (AP) _ An embattled Hillary Rodham Clinton is urging the party leaders who are key to the Democratic presidential race to take a hard look at her West Virginia win and slow their march to Barack Obama.

Clinton trounced her rival Tuesday in a primary that did little if anything to knock Obama off stride as he approaches the delegate totals needed to give him the nomination.

It did, however, expose in stark terms his disadvantage with blue-collar voters, fueling Clinton's last-gasp argument to party VIPs that she's the Democrat with broad appeal against Republican John McCain.

"Choose who you believe will make the strongest candidate in the fall," she said at her Charleston rally in a pitch aimed at superdelegates. She was returning to Washington to meet Wednesday with some of them.

"The White House is won in the swing states," she said, "and I am winning the swing states."

Obama isn't ceding the latter point.

He was campaigning Wednesday in Michigan, keenly aware of the need to recapture the unifying promise of his earlier primary and caucus wins, which transcended geography, parties and even racial divisions at times.

Specifically, he arranged to visit workers at a Chrysler factory in Macomb County, bellwether of bellwethers, and rally in Grand Rapids.

"This is our chance to build a new majority of Democrats and independents and Republicans," Obama said in Missouri, a November battleground.

With votes from 98 percent of West Virginia's precincts counted, Clinton was winning 67 percent of the vote, to 26 percent for Obama. Nearly a quarter of the voters were 60 or older, and a similar share had no education beyond high school, exit polls indicated. More than half were in families with incomes of $50,000 or less, and the former first lady was winning nearly 70 percent of their votes.

Clinton won 20 of the 28 delegates at stake in West Virginia and Obama won eight.

That left Obama with 1,883.5 delegates, to 1,717 for Clinton, out of 2,026 needed to clinch the nomination at the party convention in Denver this summer. The Democratic win on Tuesday in a Mississippi special election increased by one the number of delegates needed to win the nomination.

He added a symbolic victory Tuesday, defeating Clinton in Nebraska's nonbinding primary by a 49-47 percent margin. Nebraska already held caucuses three months ago and Obama locked up most of the delegates in that contest.

Obama picked up about 30 superdelegates in the last week, altogether a bigger prize than West Virginia offered either candidate in the lopsided primary.

Superdelegates are elected officials and other prominent Democrats who can vote as they choose, without regard to primaries or caucuses. About 250 have not declared their support.