Millionaire Tax Advances in Washington State as Legal Duel Looms

The Washington State Capitol in Olympia.

Photographer: David Ryder/Getty Images

Washington state is set to approve a new tax on millionaires, a measure that would shift how the state raises money and set off a likely court fight over a nearly century-old legal ruling.

The state’s Democratic-controlled House of Representatives passed the proposal late Tuesday after lawmakers debated through Monday night. The bill now goes to the Senate, where it is widely expected to win approval.