More members of the GOP are rallying behind Republican front-runner Mitt Romney's bid for the party's nomination for president.
Each primary win puts the former Massachusetts governor closer to the magic number of delegates needed.
Wisconsin is the next hurdle and the momentum is swinging heavily in Romney's favor.
The Republican presidential candidates are doing some last minute campaigning in "The Badger State" Monday.
But the latest polls put Romney as the clear front-runner.
"Now we're looking like we're going to win this thing on Tuesday," Romney told supporters on Saturday. "But I've got to have you guys get out and vote."
Endorsements Roll In
Voters in Wisconsin go to the polls on Tuesday.
Rep. Paul Ryan, R-Wis., announced his support for Romney and he urged voters to do the same.
"I think that the Republicans should coalesce around the Romney campaign and move on to the general election," Ryan said.
Senate Minority Leader Mitch McConnell, R-Ky., stopped short of endorsing Romney, but he recognized the changes are overwhelmingly that he will be the nominee.
"It seems to me we're in the final phases of wrapping up this nomination," McConnell said.
"And most of the members of the Senate Republican conference are either supporting him or they have the view that I do -- that it's time to turn our attention to the fall campaign and begin to make the case against the president of the United States," he said.
Former House Speaker Newt Gingrich's campaign could come to an end in Wisconsin. He acknowledged the fact that Romney could be the nominee.
"I think that he clearly has a chance to do it, and if he does succeed in doing it, obviously, Callista and I will support him, and I'm sure Rick Santorum will support him," Gingrich said.
Santorum Won't Concede
Meanwhile, former Pennsylvania Sen. Rick Santorum refuses to concede. He's hoping for a big win in his home state of Pennsylvania later this month.
Santorum would need to win 74 percent of the remaining delegates to become the nominee.
"So many of the delegates who are coming to the convention are unbound delegates," Santorum told NBC's "Meet the Press." "This idea that Gov. Romney has all of these delegates and this huge lead, the numbers don't bear that out."
Both Santorum and Romney spoke to Christian voters at the Faith and Freedom Coalition.
Romney says it's time American gets back on track.
"The president says he wants to transform America. I don't want to transform America. I want to restore to America the principles that made us the hope of the earth, and together we're going to do that," Romney said.