WASHINGTON — Sen. John McCain moved closer to clinching the Republican presidential nomination Tuesday while Sen. Barack Obama increased his lead in the race for Democratic delegates.

Obama cruised past a fading Hillary Rodham Clinton in the Wisconsin primary Tuesday night, gaining the upper hand in a Democratic presidential race for the ages.

It was Obama's ninth straight victory over the past three weeks — with results unknown late Tuesday from the Hawaii caucuses — and left the former first lady in desperate need of a comeback in a race she long commanded as front-runner.

"The change we seek is still months and miles away," Obama told a boisterous crowd in Houston in a speech in which he also pledged to end the war in Iraq in his first year in office.

"I opposed this war in 2002. I will bring this war to an end in 2009. It is time to bring our troops home," he declared.

In a race growing increasingly negative, Obama cut deeply into Clinton's political bedrock in Wisconsin, splitting the support of white women almost evenly with her. According to polling place interviews, he also ran well among working-class voters in the blue-collar battleground that was a prelude to primaries in the larger industrial states of Ohio and Pennsylvania.

Clinton made no mention of her defeat and showed no sign of surrender in an appearance in Youngstown, Ohio.

"Both Senator Obama and I would make history," the New York senator said. "But only one of us is ready on day one to be commander in chief, ready to manage our economy, and ready to defeat the Republicans. Only one of us has spent 35 years being a doer, a fighter and a champion for those who need a voice."

In a clear sign of their relative standing in the race, most cable television networks abruptly cut away from coverage of Clinton's rally when Obama began to speak in Texas.

McCain of Arizona won the Republican primary with ease, dispatching former Arkansas Gov. Mike Huckabee and edging closer to the 1,191 delegates he needs to clinch the GOP nomination at the party convention in St. Paul, Minn., next summer. He also won the primary in Washington, with 19 delegates at stake.

In scarcely veiled criticism of Obama, the Republican nominee-in-waiting said, "I will fight every moment of every day in this campaign to make sure that Americans are not deceived by an eloquent but empty call for change."

McCain's nomination has been assured since Super Tuesday three weeks ago as first one, then another of his former rivals has dropped out and the party establishment has closed ranks behind him.