On another voter-eligibility matter, Romney's campaign has sent letters to election officials in Wisconsin, Mississippi and Vermont asking that the deadline for receiving ballots from military and overseas voters be extended.
In Denver, in his comments on taxes, Romney also cited the tax plan included in the Simpson-Bowles deficit commission recommendations as a possible course. That plan calls for reducing the top income tax rates. To pay for that, the plan would eliminate or reduce many popular tax breaks, including deductions for charitable donations and mortgage interest.
While Romney did not commit to making any specific changes, saying he would work with Congress, his suggestions were more specific than those he had offered in the past and provided a new window into his thinking on the subject. In the spring, Romney told donors that he would consider eliminating home mortgage deductions for second homes. That conversation, behind closed doors, was overheard by reporters standing on a private sidewalk.
The numbers are important because Romney has said that he will lower tax rates across the board without reducing government revenue. He also says he wants wealthy Americans to continue to shoulder the same share of the tax burden as they do today. One way to make the numbers add up would be to adjust tax deductions and exemptions.
Romney campaign spokeswoman Andrea Saul insisted his plan still would cut taxes for middle income earners. "There are a range of policy options, Gov. Romney referenced one illustrative example, to achieve these goals," Saul said in an emailed statement. She did not mention any other options.
Vice presidential nominees Joe Biden and Paul Ryan campaigned Tuesday in North Carolina and Iowa, respectively. Romney's campaign is looking to regain ground on Obama after falling further behind in battleground state polls in the wake of a video showing the Republican telling donors that 47 percent of Americans believe they are victims who are entitled to government assistance. A voter in Iowa asked Ryan about the exchange, and he acknowledged Romney's comments had muddied the political landscape.
"Sometimes the point doesn't get made the right way," he said.
Romney's interviews with Denver outlets were the last ones planned before he takes the stage Wednesday night. Moderator Jim Lehrer plans to focus on the economy, health care and the role of government.
Romney's tax plans are likely to be one focus. U.S. tax law at one time limited tax deductions and personal exemptions for high income people, but those limits were removed as part of the massive package of tax cuts passed under President George W. Bush. The limits are scheduled to return next year, when the Bush-era tax cuts are scheduled to expire unless Congress acts in the meantime. Romney and other Republicans want to extend all the tax cuts while Congress works to overhaul the federal tax code. Obama wants to extend them for individuals making less than $200,000 and married couples making less than $250,000.
Romney says his plan would generate the same amount of tax revenue as the current system but do it more efficiently, without raising taxes on any group of people. Romney also says he would not raise taxes on investment income.
The Tax Policy Center, a nonpartisan research group, says it is impossible to reduce tax rates by 20 percent for the wealthy without shifting some of the tax burden to middle class families. The Romney campaign disputes the study, which has also been challenged by several conservative think tanks.
Associated Press writers Julie Pace in Nevada, Philip Elliott in Iowa, and Steve Peoples and David Espo in Washington contributed to this report.
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