MADISON, Wis. (AP) -

The Wisconsin Legislature is considering a bill that would exempt military income earned the year before a soldier is killed in combat, along with that from the year in which the soldier dies.

Andrew Johnson's son David -- a former U.S. Army first lieutenant -- was killed last year while patrolling in the Kandahar Province. Johnson says he was shocked to learn that while the federal government would forgive his son's income taxes, the state wouldn't.

The measure is up for vote Tuesday in both the Senate and the Assembly after it easily passed committees last week. Gov. Scott Walker says he will sign the bill immediately after it reaches his desk.

Nearly 6,700 U.S. soldiers have died in combat since 2001. About 150 were from Wisconsin.