WASHINGTON – Republican leaders say the government can raise tax "revenues" without raising tax "rates." But they have yet to detail how they would pursue it.

The distinction might mean little to Americans who end up with larger tax bills even if their tax rates don't change. This politically tricky trade-off is about to take center stage in negotiations over how to reduce the federal deficit and avoid going over the "fiscal cliff" in just seven weeks.

The White House says wealthy Americans must pay a higher tax rate to help produce more revenue to lower the deficit. Congressional Republicans refuse, and many want tax rates to fall instead. But they say they are open to other means of higher tax collections, which might include limits to itemized deductions.