It would be the first income tax in Washington, affecting an estimated 20,000 households. Some of the wealthiest are leaving for Florida.

Washington has moved a step closer to enacting a so-called "millionaire's tax' after the measure was approved by the state House after a more than 24-hour debate.

Add Yahoo as a preferred source to see more of our stories on Google. The Washington State Senate has approved a bill that could create the first income tax in Washington history, targeting households earning $1 million or more annually, as lawmakers race to balance the state budget before the March 12 deadline.