Carolyn Kaster, Associated Press
President Barack Obama begins his re-election campaign defending traditionally Republican territory that he carried when he won the White House four years ago. Republican Mitt Romney is looking to reclaim any combination of these GOP strongholds now in flux.
In the months leading to the Nov. 6 election, both men will talk about how they will galvanize the nation. But in reality, they will lavish travel, advertising and staff on only a dozen states, and even fewer as the vote nears.
The political spotlight will shine brightly again on Florida, and the Upper Midwest, especially Ohio. But changes in the nation's demographics will mean heavy attention paid to the Mid-Atlantic and Southwest.
"For a long time the map was static. I don't think that holds true anymore," said Tad Devine, a senior adviser to former Democratic presidential nominees Al Gore and John Kerry. "Places like North Carolina and Virginia are changing, and they are getting a fresh look."
Despite the candidates' effort to make the election a national referendum, local trends and factors may decide whether campaigns go all-out in a state or bail to channel resources elsewhere.
It's a chess game aimed at reaching the 270 electoral votes needed to win.
If the election were held now, Obama would safely carry 14 states, mainly the East and West Coasts, and the District of Columbia, with a total of 186 electoral votes. Romney, a former Massachusetts governor, probably would prevail in 20 states, primarily in the South and West, worth 156.
Both campaigns agree the election will turn on the 16 remaining states, and probably in those won by Obama in 2008 against Sen. John McCain, R-Ariz.
Obama expanded the Democratic footprint on an electoral map that had changed little between George W. Bush's narrow 2000 election and 2004 re-election. Against McCain, Obama captured nine states that Bush had won four years earlier.
Besides Florida and Ohio, Obama took North Carolina and Virginia, where a Democrat had not won in a generation. There were victories as well in Colorado, Indiana, Iowa, New Mexico and Nevada.
In Florida, unemployment tops 9 percent, tourism is slow to recover, gas prices are high and trouble persists in the housing market; all that works against Obama.
But his team is aggressively organizing in the state, and his visit Friday was his 16th since taking office, more than almost any other swing state.
Romney's battle with Rick Santorum for the GOP nomination slowed his preparations for the fall showdown in Florida. If Romney were to win the state's 29 electoral votes, it would block Obama's clearest path to 270, said Rick Wiley, political director for the Republican National Committee.
"Deny him Florida and his map alters significantly," Wiley said.
Ohio, too, is a jump-ball. In 2010, Republicans roared back. The manufacturing economy, especially its automotive parts sector in northern Ohio, continues to struggle, although unemployment has dropped below the national average.
"In Ohio, you're looking at the general election as a referendum on the economy," senior Romney adviser Kevin Madden said.
Yet Romney must contend in Ohio with the fallout from a party feud and an Obama campaign that never quit organizing after winning the state in 2008.
Republicans see North Carolina and Virginia as Romney's best chance to pick up an Obama-carried state.
Unemployment has remained at nearly 10 percent. Virginia Republicans have been emboldened by Gov. Bob McDonnell, who in 2010 ended consecutive Democratic administrations. But the states' conservative complexion has changed.
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