Obama surges past Clinton

By John Whitesides, Political Correspondent

MILWAUKEE (Reuters) - Barack Obama has surged past Hillary Clinton to open a big national lead in the Democratic presidential race, according to a Reuters/Zogby poll released on Wednesday.

Obama also leads Republican front-runner John McCain in a potential November election match-up while Clinton trails McCain, enhancing Obama's argument he is the Democrat with the best shot at capturing the White House.

Among Republicans, McCain has a substantial national lead over his last major challenger, former Arkansas Gov. Mike Huckabee, as he takes his final steps toward clinching the nomination.

Heading into crucial March 4 nominating contests in Ohio and Texas, Obama has gained the upper hand in a close and fierce Democratic duel with Clinton. McCain broke open the Republican race and has driven out most of his leading rivals.

The poll showed Obama with a 14-point edge over Clinton, 52 percent to 38 percent, after being in a statistical tie with the New York senator last month.

Obama's new lead follows a string of 10 wins in February for the Illinois senator, who has moved ahead in the battle for pledged delegates who vote on the party's nominee at the August convention.

"Obama has the hot hand and you can clearly see his momentum in the national numbers," pollster John Zogby said. "This is what happens when you win a bunch of primaries in a row -- or maybe this is why you win a bunch of primaries in a row."

The poll was taken last Wednesday through Saturday, before a weekend controversy over Obama's uncredited recycling of speech lines from a friend, and before Obama captured two more wins in Wisconsin and Hawaii on Tuesday to extend his winning streak.

In the poll, Obama led Clinton among Democrats and independents, in all age groups except seniors and in all income groups except those making under $25,000 a year. He led narrowly among whites and more widely among men. He was tied among women with Clinton, who would be the first woman U.S. president.

Obama, who would be the first black U.S. president, was the choice of 4 of 5 black voters. Clinton attracted two-thirds of Hispanic voters, who comprise a big bloc in Texas.

"It can all turn on a dime and it already has turned on a dime. This has been a roller coaster of a race," Zogby said.

OBAMA BEATS MCCAIN

In a head-to-head matchup, Obama beat McCain 47 percent to 40 percent. He led McCain among independents, in all age groups except those above 70, and in all regions but the South.

McCain beat Clinton 50 percent to 38 percent in a head-to-head matchup. The Arizona senator led Clinton in all regions of the country, among independents and in all age groups.

"At least for now, these numbers suggest Obama has the potential to build a stronger general election coalition than Clinton," Zogby said. "They also suggest Clinton has a lot of catching up to do."