So goes the effort to win four Democratic and three Republican presidential nomination contests this weekend - a round getting less than the full treatment by the remaining hopefuls, but plenty of attention still.

Suspense drained from the Republican side when Mitt Romney suspended his campaign Thursday. That left John McCain the prohibitive favorite, Huckabee the long-shot and Ron Paul even more of an asterisk.

Nonetheless, voters in Washington state, Kansas and Louisiana take part in GOP contests Saturday that, absent an improbable insurgency against the one-time insurgent McCain, have become his virtual coronation. President Bush nudged conservatives Friday to unite behind the presumed nominee.

There was plenty of drama for Obama and Clinton, competing for 161 delegates Saturday in Washington state, Louisiana, Nebraska and the Virgin Islands, followed by Maine caucuses with 24 delegates on Sunday.

Obama won the last-minute endorsement Friday of Washington Gov. Chris Gregoire, only the second female governor of the state. Both candidates had courted her - Obama speaking with her four times.

"He is leading us toward a positive feeling of hope in our country and I love seeing that happen," she said. Washington's senators, both women, back Clinton.

In strongly Republican and sparsely populated Nebraska, Obama spoke to the huge crowd at an Omaha arena Thursday, exhorting: "You're here because you don't want to just be against something. You want to be for something.

Chris Slaughter, 20, heard the speech and said: "He's a once-in-a-generation candidate."

Obama was the only candidate campaigning in all four states. Clinton told a spirited rally of 5,000 supporters at a Seattle cruise ship terminal Thursday night that she's "a fighter and a doer and a champion for the American people." She also planned to campaign in Maine.

Clinton and Obama both have an eye on the round that follows - the trio of races Tuesday in Virginia, Maryland and the District of Columbia - and the New York senator in particular was gearing her campaign toward the high stakes primaries in Ohio and Texas on March 4.

Obama, an Illinois senator, has proved a strong performer in the complex logistics of caucuses and a candidate flush with money, two advantages going into the weekend. Clinton enjoyed several notable endorsements in Washington and Maine, and a strong organization.

Huckabee campaigned in Kansas even as GOP stalwarts said it was time to close ranks and questions grew about how long the former Arkansas governor would stay in the hunt.

"An election is about a choice," he said in Olathe on Friday, "not a coronation."

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A look at the races:

WASHINGTON CAUCUSES:

The stakes: 78 Democratic delegates, 18 GOP delegates.

The campaign: Obama and Clinton both stumped in the state, the Illinois senator planning a rally Friday at an arena in the shadow of the city's Space Needle. Across the Cascade Mountains, Obama's wife, Michelle, planned to campaign Friday in Spokane.

McCain planned an event Friday evening in Seattle and Huckabee's wife, Janet, was expected in the city's eastern suburbs Friday.

Lay of the land: Obama is thought to have an advantage in the caucuses, which are dominated by party activists. However, Washington has a strong history of electing women.

Polls done shortly before John Edwards dropped out indicated a tight race between Clinton and Obama, with Edwards a strong third. Since then, some of Edwards' strongest supporters have endorsed Obama.

Social conservatives have a history of packing the GOP caucuses, which could boost Huckabee. But with McCain now a shoo-in, some who would normally vote in the Republican race might be drawn to the higher-stakes Democratic contest. Washington voters don't register by party.

Political scientist Bryan Jones of the University of Washington says of the voters: "They're Obama-crazy here, even the Republicans."

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LOUISIANA PRIMARIES:

The stakes: 56 Democratic delegates, 20 Republican delegates.

The campaign: Obama spoke Thursday to a crowd of some 4,000 in New Orleans. Bill Clinton was visiting the state Friday.

Lay of the land: A heavy turnout by black voters would benefit Obama. The state is close to one-third black and has only a small population of Hispanics, a group that has favored Clinton.

The 20 GOP delegates are only awarded if a candidate gets a majority of the votes, a prospect enhanced now that Romney has suspended his campaign.

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NEBRASKA DEMOCRATIC CAUCUSES:

The stakes: 24 Democratic delegates.

The campaign: Obama was the only candidate visiting Nebraska. Michelle Obama was rallying for her husband Friday in Lincoln. Obama has run TV ads in Omaha and Lincoln, and a radio spot in rural areas.

Clinton introduced a 30-second ad that features a testimonial from former Nebraska Sen. Bob Kerrey. Her daughter Chelsea spoke to university crowds.

Lay of the land: The Clinton campaign claimed a strong grass-roots organization. Obama has been endorsed by state party leaders and lawmakers as well as by Sen. Ben Nelson, the only Democratic member of the state's congressional delegation.

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KANSAS REPUBLICAN CAUCUSES:

The stakes: 36 Republican delegates.

The campaign: McCain planned to speak in Kansas City on Friday, en route to Seattle. Huckabee had events in Olathe, Wichita, Topeka and Garden City.

Lay of the land: McCain was favored even before Romney's departure, but Huckabee also hoped to do well, on the strength of social conservatives. State party leaders had split endorsements between McCain and Romney.

The state's largest anti-abortion group endorsed Huckabee on Thursday.

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MAINE DEMOCRATIC CAUCUSES:

The stakes: 24 Democratic delegates.

The campaign: Clinton planned to campaign at the University of Maine in Orono and Obama planned a rally in Bangor, both on Saturday. Bill Clinton was the advance man for his wife, rallying Thursday in Portland.

Lay of the land: Gov. John Baldacci is backing Clinton and led several dozen state lawmakers in a rally for her Thursday.

Clinton introduced a 30-second ad asserting: "I intend to be a president who stands up for all of you" after seven years with a president who stood up for "oil companies, the predatory student loan companies, the insurance companies and the drug companies."

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VIRGIN ISLANDS DEMOCRATIC CAUCUSES:

The stakes: 3 Democratic delegates.

The campaign: Alas, no fun in the sun for any candidate.

Lay of the land: In November, Obama attracted more than 100 supporters to a one-hour reception in St. Thomas that cost up to $2,300 to attend.

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Associated Press writers John Hanna in Olathe, Kan., David Ammons in Seattle, Anna Jo Bratton in Omaha, Neb., Brian Schwaner in New Orleans, Glenn Adams in Augusta, Maine, and Stephen Ohlemacher in Washington contributed to this report.