MADISON, Wis. (AP) -

Milwaukee area leaders are speaking out against a proposal that would reduce the authority of the Milwaukee County Board and require a vote next year on cutting salaries for county supervisors in half.

An Assembly Committee was hearing the bill Wednesday and the full Assembly was scheduled to take it up on Tuesday.

The proposal would reduce the board's resources and authority, increase the power of the county executive and require a binding referendum next year on cutting supervisor salaries. Bill sponsor Rep. Joe Sanfelippo, a Republican and former member of the Milwaukee County Board, says the measure will make the board operate more efficiently.

But opponents call it a power grab and an attack on local government.

Gov. Scott Walker, former Milwaukee County executive, supports the measure.