Republican Mitt Romney cast President Barack Obama as a failed coach of a struggling team as he sought to capitalize on momentum coming out of his party's convention.
Obama dismissed the GOP gathering as an event suited to the era of black-and-white TV and promised to outline "a better path forward" at the upcoming Democratic convention where he'll be nominated for a second term.
The two rivals campaigned Saturday across several battleground states expected to decide the outcome of the closely fought presidential contest. Obama was in Iowa before heading to Colorado, part of a three-day tour that will take him into his convention opening Tuesday in Charlotte, N.C.
Romney spoke at rallies in Ohio and Florida before flying to his vacation home in New Hampshire for some time off. Campaign officials said the former Massachusetts governor would spend much of the Democrats' convention week doing debate preparation.
At rallies in Cincinnati and Jacksonville, Fla., Romney channeled many voters' interest in the first weekend of the college football season.
"I don't like the way the way the game is going under this president," Romney said, pointing to the high jobless rate and approximately 23 million people who are unemployed or working part-time. "If there's a coach whose record is 0 and 23 million, you get rid of him and get someone new."
The former Massachusetts governor reiterated his pledge to create 12 million new jobs and make the U.S. energy independent in eight years but did not offer specifics on how he would achieve those goals.
Obama seized on the dearth of policy details outlined by Romney and other Republicans at their convention in Tampa, Fla.
"There was a lot of talk about hard truths and bold choices, but no one actually told you what they were," Obama said in Urbandale, Iowa, warning a Romney administration would offer "retreads of the same old policies that have been sticking it to the middle class for years."
Obama made Iowa his first stop on what his campaign billed as "The Road to Charlotte." He told the crowd he did so "because it was you, Iowa, who kept us going when the pundits were writing us off."
The president carried Iowa in 2008, and in an indication of the struggle he now faces, he has been lavishing time on the state in recent weeks. He had a second Iowa stop during the day before flying to Colorado for a Sunday appearance before college students at the University of Colorado.
Obama urged Iowa supporters to take advantage of the state's early voting rules. Early voting opens there on Sept. 27, weeks before the November 6 general election.
Obama's schedule for Monday includes an appearance in Toledo, Ohio, yet another battleground state, before a trip to Louisiana to inspect damage from Hurricane Isaac.
Romney visited Louisiana on Friday.
Viewership was down markedly for the GOP convention this year. According to The Nielsen Co., some 30 million viewers tuned in Thursday night when Romney gave his acceptance speech compared to some 40 million who watched Arizona Sen. John McCain accept the Republican nomination in 2008.
Democrats were eager to recapture the spotlight at their own gathering. But the convention's location served as an unwelcome reminder to the Democrats of an economy so weak that it threatens Obama's chances for re-election.
The president carried North Carolina in 2008, but the state's unemployment rate is pegged at 9.6 percent, well higher than the nation's 8.3 percent and tied with next-door South Carolina for fifth from the bottom.
The Democrats' convention at the Time Warner Cable arena will feature evening speeches by first lady Michelle Obama and San Antonio Mayor Julian Castro, the keynote speaker.
The president will be nominated for a new term on Wednesday, when former President Bill Clinton also will speak. Vice President Joe Biden delivers his own acceptance speech the same evening.
Obama's prime-time acceptance speech, to be delivered at the outdoor Bank of America Stadium, caps the convention on Thursday night. Aides predict a capacity crowd will hear the speech at the site, which can hold nearly 74,000.
Democrats are taking their turn in the convention spotlight just days after the Republicans met in Tampa to nominate Romney for the White House and Wisconsin Rep. Paul Ryan to be vice president.
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