TOLEDO — Sen. Hillary Clinton used her final day campaigning in Ohio before Tuesday’s crucial primary to question Sen. Barack Obama’s experience and raise what she said are "serious questions" about his position on the North American Free Trade Agreement, a major issue among blue-collar voters.

Clinton pointed to a report suggesting that despite Obama's public position that he would renegotiate NAFTA, his senior economic policy adviser privately told Canadian officials to view the debate in Ohio over trade as "political positioning," according to a memo obtained by The Associated Press. The adviser says he was mischaracterized.

Clinton also made a final pitch with her argument that she has the most experience in the race, especially on foreign affairs. She said Obama can only point to a speech he gave in 2002 opposing the Iraq war — and that even presumptive Republican nominee John McCain is more qualified.

"I think that I have a lifetime of experience that I would bring to the White House," Clinton said during a press conference this morning at a Toledo hotel. "I know Sen. McCain has a lifetime of experience that he would bring to the White House, and Sen. Obama has a speech he gave in 2002."

Obama has rejected such rhetoric, noting that Clinton voted to authorize the war in 2002 and arguing that his position on the war shows he has the judgment required to be commander in chief.

Clinton has campaigned tirelessly in recent days in Ohio, and analysts say she probably needs to win to keep her campaign for the Democratic presidential nomination viable.

The New York senator predicted at the press conference with Gov. Ted Strickland that she will do well in Tuesday's key primaries in Ohio and Texas and expects to continue campaigning for Pennsylvania's April 22 primary and beyond.

"I think I know what’s happening, and I believe that we’ll do well tomorrow, and I believe that that’s going to be a very significant message to the country," Clinton said. "And then we move on to Pennsylvania and the states still ahead. I’m just getting warmed up."

Added Strickland, who has campaigned all over Ohio with Clinton: "We’re looking forward to a great victory tomorrow."

"I think I know Ohio very well, and I know what’s important to Ohio and Ohioans, and the things that the senator has been talking about are the things that are important to the families of Ohio," the governor said.

The memo, meanwhile, is the first documentation to emerge publicly out of the Feb. 8 meeting between the Obama adviser, Austan Goolsbee, and officials with the Canadian consulate in Chicago. Clinton argued that the memo debunks previous denials from Obama’s camp that there never was such a discussion about NAFTA.

"I don't think people should come to Ohio and tell the people of Ohio one thing, and then have your campaign tell a foreign government something else behind closed doors," Clinton said. "So that's the kind of difference between talk and action that I've been pointing out throughout this campaign."

Strickland also addressed the issue at a rally for Clinton at the University of Toledo this morning, saying, "We people in Ohio believe that you ought to say what you mean and you ought to mean what you say."

But Goolsbee disputed the characterization from the conservative government official.

"This thing about ‘it's more about political positioning than a clear articulation of policy plans' (from the memo) that's this guy's language," Goolsbee said of the memo’s author, Joseph DeMora, who works for the consulate and attended the meeting, the wire service said. "He's not quoting me. I certainly did not use that phrase in any way."

Goolsbee said he has been surprised that such a banal and trivial meeting with a low-level consulate official has created so much controversy and resulted in such an inaccurate depiction. He said he was invited to the consulate to meet the officials and get a tour.

The Obama campaign also released a statement saying that Clinton "knows full well that she's not telling the truth on this story, and that her blatant distortion is just part of her campaign's stated strategy to throw the kitchen sink at Senator Obama in the closing days of this campaign."

"The truth is, Senator Clinton called NAFTA a victory and has switched positions for raw political reasons. Her false attack won't protect American workers, but as president, Senator Obama will," said Obama spokesman Bill Burton.

Even so, Clinton suggested during her press conference that if the story was raising questions about one of her adviser in the same situation, the media would be pursuing the story more aggressively — a criticism her campaign has been making in recent weeks.

"I would ask you to look at this story, substitute my name for Sen. Obama’s name and see what you would do with this story," Clinton said.

Obama has said he always has been opposed to NAFTA and has hammered Clinton in Ohio for saying positive things about NAFTA in the past.

After sending out a mailer on NAFTA that Clinton angrily denounced, Obama followed up with another mailer last week reiterating his opposition to NAFTA with a big picture of Clinton and the caption, "Time and time again, Hillary Clinton has praised NAFTA."

Clinton has said she always had reservations about NAFTA and would tell both Canada and Mexico that she would opt out of the agreement if the trade deal were not renegotiated with tougher labor and environmental standards. Obama has taken the same position.

The issue is critical because many blue-collar workers – a constituency both candidates need in a Democratic primary – blame NAFTA on part for the loss of more than 257,000 manufacturing jobs in Ohio since the beginning of 2000.

Clinton started the day early to greet workers at the Jeep plant in Toledo in the pre-dawn dark before the 6 a.m. shift change.

Both Clinton and Strickland shook hands with workers at the 2,500-employee Chrysler Toledo North Assembly Plant, which makes the Jeep Liberty and Dodge Nitro, as they arrived. Clinton told the workers, "I need your help tomorrow," "Honored to have your vote tomorrow" and "Go make some Jeeps."

"Spread the word for Hillary in the plant, will you?" Strickland said to one worker.

John Thomas, a 32-year inspector at the plant from nearby Delta, was surprised to see the New York senator when he arrived for work this morning and said he’s supporting her over Sen. Barack Obama.

"I like what she stands for, and I think she’ll change things for the working person," said Thomas, 52.

Deborah Young, 51, of Toledo, got her picture taken with Clinton and said she’s impressed that Clinton has "tackled a lot in life, personally and professionally."

"She's compassionate like a woman but strong like a man," said worker Gwen Wright, 53, of Toledo.

Clinton was traveling this afternoon back to Texas, the other major prize in tomorrow’s primary. She plans to return to Ohio and spend election night in Columbus, awaiting returns. Obama is expected to remain in Texas throughout the primary.