That's what House Bill 1572 would do, and it was passed by the House today on a 54-43 vote.
Right now, Pierce County is the only remaining outlier, the only county that still lets some voters cast their ballots at the polls once in a while. And they are likely to keep allowing that if this bill fails to pass the Senate.
The bill now heads to the Senate. If it passes the Senate, the bill would take effect 90 days after the Legislature adjourns, so the August primary election in Pierce County would be entirely by mail.
King and Pierce were the only ones with poll voting in the November 2008 general election, but that was the last one for King.