Romney watched on television with his wife, Ann, at a hotel suite across the street from the hall as the convention sealed his hard-won victories in the primaries and caucuses of last winter.
"I read somewhere that Mitt and I have a "storybook marriage," she said in excerpts released in advance of a primetime speech meant to cast her multimillionaire-businessman-turned-politician husband in a soft and likable light. "Well, in the storybooks I read, there were never long, long, rainy winter afternoons in a house with five boys screaming at once."
"A storybook marriage? No, not at all. What Mitt Romney and I have is a real marriage," she said.
Aides said her husband of 43 years would be in the hall when she spoke.
Through the evening, a parade of convention speakers mocked Democratic President Obama mercilessly from a made-for-television podium, as if to make up for lost time at an event postponed once and dogged still by Hurricane Isaac.
The Democratic president has "never run a company. He hasn't even run a garage sale or seen the inside of a lemonade stand," declared Reince Priebus, chairman of the Republican Party.
Said House Speaker John Boehner, "His record is as shallow as his rhetoric."
To send Romney and ticketmate Paul Ryan into the fall campaign, delegates approved a conservative platform that calls for tax cuts — not government spending — to stimulate the economy at a time of sluggish growth and 8.3 percent unemployment.
Polls make the race a close one, to be settled in a string of battleground states where neither Romney nor the president holds a secure advantage.
While there was no doubt about Romney's command over the convention, the residue of a heated campaign for the nomination was evident inside the hall.
Texas Rep. Ron Paul, who never won a primary or caucus, drew several dozen delegate votes — precisely how many were not announced from the podium. Earlier, his supporters chanted and booed after the convention adopted rules they opposed, but were powerless to block, to prevent those votes from being officially registered. "Shame on you," some of his supporters chanted from the floor.
Boehner, presiding over the roll call, made no attempt to have Romney's nomination made by acclamation, even though Ryan's was a few moments later.
The night was Romney's for sure, but some of the loudest cheers were accorded Wisconsin Gov. Scott Walker, a hero among Republicans for fending off a labor-backed recall attempt last spring.
Convention planners squeezed two days of speeches and other convention business into one after scrapping Monday's scheduled opener because of fears that Isaac would make a direct hit on the Florida Gulf Coast.
That threat fizzled, but it was instantly replaced by another — that Republicans would wind up holding a political celebration at the same time the storm turned its fury on New Orleans, devastated almost exactly seven years ago by Hurricane Katrina.
Romney's convention planners said they were in frequent contact with weather forecasters, but they declined to discuss what contingency plans, if any, they had to accelerate plans for him to deliver a formal acceptance speech Thursday night.
Ratification of a party platform was prelude to Romney's nomination, a document more conservative on abortion than the candidate.
On economic matters, it backs extension of the tax cuts enacted in 2001 and 2003 and due to expire at year's end, without exception. It also calls for an additional 20 percent reduction in income tax brackets that Romney favors.
In a time of 8.3 percent unemployment and the slowest economic recovery in the post-World War II era, that went to the crux of the campaign for the White House.
By contrast, Obama wants to allow existing tax cuts to expire on upper income taxpayers, and has criticized Romney's overall economic plans as a boon to millionaires that would raise taxes on the middle class.
The GOP platform also pledges that a Republican-controlled Congress will repeal, and Romney will sign, legislation to repeal the health care legislation Obama won from a Democratic-controlled Congress. So, too, for the measure passed to regulate Wall Street in the wake of the 2008 economic collapse.
On abortion, the platform says, "The unborn child has a fundamental individual right to life which cannot be infringed."
Romney opposes abortions, except in cases of rape, incest, or when "the health and life of the mother" are at stake, he said in a convention week interview.
Obama, who accepts renomination at the Democratic National Convention in Charlotte, N.C., next week, campaigned in Iowa Tuesday as he set out on a tour of college campuses in battleground states in hopes of boosting voter registration among college students.
Before departing the White House, he made a point of appearing before reporters to announce the government's latest steps to help those in the way of Isaac. He signed a declaration of emergency for Mississippi and ordered federal aid to supplement state and local storm response efforts in the state.
His surrogates did their best to counter Romney and the Republicans.
Los Angeles Mayor Antonio Villaraigosa, dismissing GOP attempts to woo Hispanic voters, said, "You can't just trot out a brown face or a Spanish surname and expect people are going to vote for your party or your candidate." He added, "This is a party with a platform that calls for the self-deportation of 11 million people."
Hispanics strongly favor Obama, according to public polls, and Romney and his party have been seeking to win a bigger share of their votes by emphasizing proposals to fix the economy rather than ease their positions on immigration.
Female voters, too, prefer the president over his challenger, and Democrats have done their best to emphasize GOP opposition to abortion and even suggest the party might try and curtail access to contraceptives if it wins power.
Whatever the impact of those issues, the polls show the economy is overwhelmingly the dominant issue in the race, and on that, the voters narrowly say they trust Romney more.
In an AP-GfK poll taken Aug. 16-20, some 48 percent of registered voters said they trust Romney more on economic issues, to 44 percent for Obama.
However, a Washington Post-ABC News in the days immediately before the convention found that 61 percent of registered voters said Obama was more likable, and 27 percent said Romney.