Democrats say Mitt Romney manipulated his deductions to keep his overall 2011 federal income tax rate below a certain level for political purposes. The Republican presidential nominee is certain to face new questions about his finances. Romney and his wife, Ann, donated roughly $4 million to charities last year, but they only claimed a deduction of $2.25 million on their tax return, filed with the Internal Revenue Service on Friday. Romney made $13.7 million last year and paid $1.94 million in federal income taxes, giving him an effective tax rate of 14.1 percent. That was a bit above the 13.9...