Washington voters will decide in November whether to overturn an income tax on high earners, while some Democrats are discussing whether such a tax should reach people earning less than $1 million.

If the law survives the ballot vote and a court challenge, it is set to begin collecting revenue in 2029. It would tax income above $1 million at 9.9%, applying to roughly 20,000 households earning more than $1 million a year.

State Rep. Cindy Ryu, a Democrat running for a Senate seat in Shoreline’s 32nd Legislative District, has suggested taxing net income starting at $250,000, at a lower rate for those below $1 million. Her opponent, incumbent Democratic Sen. Jesse Salomon, has not said whether he backs a graduated tax. He said he would consider a $750,000 threshold in exchange for reductions in some property taxes.

Senate Majority Leader Jamie Pedersen, who helped design the law, personally supports a broader income tax but said expansion is not viable soon. Republicans who oppose the current tax say the discussion is a reason to overturn it.