OKLAHOMA CITY — A year after Republicans swept into office, many have their sights on what has long been a fiscal conservative's dream: the steep reduction or even outright elimination of state income taxes.

The idea is gaining broader support. It's not clear how states would make up for the lost revenue.

Efforts are already under way in Idaho, Kansas, Maine, Missouri, Ohio, Oklahoma and South Carolina. Nine states don't use income tax. But the rest of the country uses income taxes to fulfill many fiscal needs.