(CNN) -- On the biggest day of Republican primary voting since last month's Super Tuesday, the certain GOP presidential nominee and the incumbent president he hopes to unseat both appeared to be in full general election mode.
Mitt Romney planned a speech Tuesday night in New Hampshire that his campaign said would signal the virtual conclusion of the GOP primary campaign, while President Barack Obama emphasized the themes of equal opportunity and Republican intransigence in courting the youth vote in speeches on college campuses.
With five states holding primary elections, the only drama left appeared to be the size of the margins of victory for Romney in his march toward the 1,144 delegates needed to clinch the Republican nomination to take on Obama in November.
Voters cast ballots in New York, Pennsylvania, Connecticut, Delaware and Rhode Island. While he continues to campaign in primary states along the road to the nomination, Romney now has his eyes on a larger prize: the White House.
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Of the five states voting Tuesday, Pennsylvania is the only one where Romney could be competitive against Obama.
Romney's campaign is casting his speech, in the state in which he kicked off his campaign and that handed him his first primary victory this cycle, as a pivot to the general election campaign.
"We launched this campaign not far from here on a beautiful June day. It has been long and extraordinarily rewarding," Romney will say, according to advance excerpts released to reporters.
The excerpts preview a speech in which Romney will maintain his argument that the Obama presidency has been an economic failure.
Romney will also address the issue of wealth and financial success, a thorny issue that he has stumbled over during the campaign.
"I see an America with a growing middle class, with rising standards of living," Romney will say. "I see children even more successful than their parents -- some successful even beyond their wildest dreams -- and others congratulating them for their achievement, not attacking them for it."
Far ahead of the field in the battle for delegates, Romney became the presumptive nominee April 10 after his closest rival, former U.S. Sen. Rick Santorum of Pennsylvania, suspended his campaign. Even though former House Speaker Newt Gingrich and U.S. Rep. Ron Paul of Texas continue their long-shot bids for the White House, the party appears to be consolidating around Romney.
According to a CNN estimate, Romney has 695 of the 1,144 delegates needed, with Santorum holding 273 delegates, Gingrich with 141 and Paul with 72. By CNN's count, the earliest Romney could reach the nomination threshold is late May, while Obama already has clinched the Democratic nomination as expected.
Gingrich told NBC on Monday that he would "reassess" his campaign depending on how he finishes in Delaware, a winner-take-all state in which he has campaigned for several weeks.
"I think we need to take a deep look at what we are doing," Gingrich told NBC. "We will be in North Carolina tomorrow night, and we will look and see what the results are."
Gingrich had previously said he would stay in the race until Romney reached the 1,144-delegate mark. He said Monday he hoped to do well in Delaware -- "either carry it or come very, very close."
Gingrich spokesman R.C. Hammond said Gingrich would in the coming days "assess whether or not there is a path forward," and a decision could come "in a few days."
Gingrich doesn't believe his staying in the race is hurting the party, Hammond said, and his motivation is "nothing personal against Romney."
Paul told CNBC on Monday that he won't step aside, even if Romney soon clinches the nomination.
"If tomorrow, Romney had the absolute number, I would probably continue in a modified way to maximize the number of delegates to go to the convention," Paul said on "Squawk Box," adding that his supporters insist he stay in the running.
"What is remarkable is how much this race has changed, now that it has become a general election contest between Mitt Romney and President Obama," Republican strategist and CNN contributor Alex Castellanos said. "The pathetically small GOP contest has been left behind."
"It has been replaced by a much larger election about two dramatically different views about what kind of country we are going to be and whether fairness or growth is our biggest problem," added Castellanos, who was a top media adviser for Romney's 2008 nomination bid but who is not taking sides this cycle.
Romney planned a series of fundraising events Wednesday and Thursday in New York and New Jersey, signaling his shift to general election mode after the latest primaries.
"Each fundraising event is important as we go towards the general election. He has been having much success in fundraising," said Phil Rosen, a major Romney contributor and co-host for a New York event. "There are two pieces of the puzzle: extreme dissatisfaction with President Obama. Second part: giant appeal of Gov. Romney on all aspects of the presidency."
Obama, meanwhile, delivered a fiery speech to college students Tuesday on holding down federal student loan rates, taking up an issue important to young voters by saying he wants them to have a fair shot at a degree without taking on a mountain of debt.
At the University of North Carolina, Obama recounted how the student debt he and first lady Michelle Obama owed after getting married exceeded their first mortgage.
Without naming Romney, Obama sought to distinguish his background from that of the multimillionaire businessman and former Massachusetts governor.
"This is something Michelle and I know about firsthand," Obama said of student debt, pausing amid cheers and laughter from the energetic crowd. "I just want everybody here to understand. ... I didn't just read about this. I didn't just get some talking points about this. I didn't get some policy briefing on this. Michelle and I -- we have been in your shoes. Like I said, we didn't come from wealthy families."
Obama will also visit the University of Colorado later Tuesday, followed by a visit Wednesday to the University of Iowa, to push for extending lower student loan rates.
All three universities are in states that Obama narrowly won in the 2008 election, which are considered battleground states again in 2012. In addition, the president will appear on the "Late Night with Jimmy Fallon" show Tuesday to discuss the issue.
Five years ago, rates for the popular student loan program were lowered to 3.4% from 6.8%. Without an extension, the lowered rates are set to expire on July 1 and return to 6.8%.
In a rare show of agreement with Obama, Romney said Monday he supports extending the lowered loan rates for low- and middle-income undergraduates.
"With the number of college graduates who can't find work or who can only find work well beneath their skill level, I fully support the effort to extend the low interest rate on student loans," Romney said before a campaign event in Astor, Pennsylvania.
Last year, when asked about the rising cost of higher education, Romney suggested that market forces would lead some colleges to lower the price of receiving an education in order to compete in attracting cost-conscious students.
Senate Republican leader Mitch McConnell, R-Kentucky, indicated Tuesday that an agreement would be worked out in view of the support for extending the lower loan rate by both Obama and Romney.
Romney needs to overcome a big Obama advantage among young voters. In 2008, voters ages 18 to 29 supported Obama over Republican nominee Sen. John McCain by 66% to 32%, according to CNN exit polling.
Obama has maintained his lead among the group, according to the latest CNN/ORC International Poll, with 64% support to Romney's 32%.
Rep. Aaron Schock of Illinois, a Romney surrogate who is the youngest member of Congress, argued Tuesday that Obama's rhetoric has not translated into a better culture for young voters.
"The reality is there's not been opportunity for young people as they've graduated from college," Schock said on a conference call with reporters organized by the Romney campaign. "Half of the young people who graduated last year are still unemployed or underemployed. Nearly the same percent still live with their parents."
Of the five states holding primaries Tuesday, New York is the largest, with 92 delegates at stake, followed by Pennsylvania's 54 delegates. Also voting Tuesday are Connecticut with 25 delegates, Delaware with 17 delegates and Rhode Island with 16.
Romney has campaigned in all five states over the past couple of weeks. Even if he were to win all 204 delegates up for grabs Tuesday, Romney won't have enough to formally clinch the nomination, which is most likely to happen next month.
