(This article originally appeared on PubliCola and has been reprinted under an agreement.)

For the first time in Washington state history, state legislators had a floor vote on a long-proposed capital gains tax. Even more novel: They passed it.

On Saturday, March 6, the Senate Democrats, led by Sen. June Robinson (D-38, Everett) pushed SB 5096 through the senate. The bill passed 25 to 24 with most of the Democratic majority, including all of Seattle’s delegation, voting for it. The entire Republican caucus, along with moderate Democratic Senators Steve Hobbs (D-44, Lake Stevens), Mark Mullet (D-5, Issaquah), Annette Cleveland (D-49, Vancouver), and Tim Sheldon (D-35, Potlatch), voted against the bill. A capital gains tax has been part of Governor Jay Inslee’s biennial budget proposals since 2014 and has appeared in every biennial budget proposal since.