WASHINGTON (AP) -- A Washington state victory in hand, Mitt Romney is looking ahead to Tuesday's 10-state bonanza that features contests from Alaska to Ohio to Massachusetts, millions in campaign spending and the largest single day of voting yet in the Republicans' topsy-turvy primary race.
The forme Rick Santorum, Newt Gingrich and Ron Paul sought to keep their candidacies afloat.
"The voters of Washington have sent a signal that they do not want a Washington insider in the White House. They want a conservative businessman who understands the private sector and knows how to get the federal government out of the way so that the economy can once again grow vigorously," Romney said in a statement Saturday night before heading to Sunday campaign stops in Georgia and Tennessee.
Rick Santorum, in search of his first wins since Feb. 7, urged Ohio Republicans not to heed those who cast Romney as the inevitable nominee. He said the race was far from over, even as he was locked in a tight race in Washington state for second place with Paul.
"We need someone who can go out and make the case, not with the most money, but with the best ideas, the best vision, the best track record," Santorum said in Bowling Green, Ohio. "Go out and make this election about big things."
Santorum planned a Sunday appearance on "Fox News Sunday" before campaigning in Tennessee and Oklahoma, two states that could turn around his struggling, rag-tag campaign. He is far outpaced in organization and it's not clear he even has paid staff on the ground in the upcoming states.
Meanwhile, Gingrich looked to blitz the Sunday talk shows, appearing on four national morning programs but planned no campaign events with actual voters, reflecting his strategy of using media appearances to offset his advertising and organizational disadvantages. Gingrich, leading in the polls in his home state of Georgia, is looking for his first victory since his lone win in South Carolina on Jan. 21.
Gingrich has cast the Georgia showdown as a do-or-die day for his struggling campaign.
During an evening appearance in Bowling Green, Ohio, Gingrich made no mention of the Washington results, instead focusing remarks on his plan to try to reduce the nation's dependence on foreign oil. It's part of his strategy to win voters' support with ideas over organization and spending.
"We're back on the upswing," Gingrich claimed after his dinner speech. "I think the margin between Santorum and me has closed very dramatically in the last 10 days. And that's part of this competition is to get back to a position to be able to compete head-to-head with Romney."
That dynamic -- Romney versus a conservative alternative -- has dominated the race to this point, as candidates have risen as Romney's chief rival and then collapsed under a barrage of spending and negative attacks. Santorum seemed to have settled into that role, but his scrappy campaign was set to be tested on its largest stage yet. The former senator from Pennsylvania lacks the infrastructure of his rivals and is being badly outspent.
But, perhaps a sign that money alone wouldn't determine the nominee, Santorum and Romney were in a close race in Ohio, seen as the crown jewel of Super Tuesday. Romney and Santorum maneuvered for their next showdown in that big industrial state.
Gingrich planned a 30-minute infomercial on statewide cable television, hoping to offset his relative absence and pick up a few delegates. Gingrich visited the Buckeye State for just one day.
Romney, by contrast, planned to spend every night before Tuesday in Ohio.
Paul, the Texas Republican and a favorite of his party's libertarian wing, also planned to hit two news shows and then campaign in Alaska.
With contests in 10 states and 419 delegates up for grabs, Tuesday was shaping up to be a hard-fought day that could settle -- or shuffle -- the quest for the Republican nomination.
There also are primaries in Massachusetts, where Romney was governor, and Virginia, where Gingrich and Santorum failed to qualify for the ballot. Other contests are in Vermont, North Dakota and Idaho.
Associated Press writer Ken Thomas in Bowling Green, Ohio, contributed to this report.