Mitt Romney's wife is reinforcing her husband's refusal to make public more of his of tax returns, saying "we've given all you people need to know" about the family's finances.

Ann Romney tells ABC News she thinks the Obama campaign's attacks on her husband have been "beneath the dignity of the presidency." And she says people will decide whom to vote for based on whether their lives would be better under Mitt Romney than President Barack Obama.

She says she believes voters are "going to fire the coach."

Ann Romney says the family gives 10 percent of its income to the Mormon church and he took no salary during his four years as Massachusetts governor. She says that should be enough to put aside people's concerns about his finances.