We're in hypothetical-land here, but it's worth noting that there are now 30 U.S. Senators who say they will vote for the public option if—if—it comes up in the (still iffy) reconciliation process.
Both of Washington's senators are among that group of 30, with Patty Murray getting a mention on TPM's latest tally and Maria Cantwell's spokesman telling me:
Senator Cantwell has said that if the public option comes up for a vote she will support it, including under reconciliation.
UPDATE: Senator Murray's spokesman e-mails over her statement:
I've been consistently supportive of a public option so that Washington's families and businesses have choices in their health care options and so insurance companies are finally forced to compete for the business of the American people. Nothing has changed that support. I don't know whether the votes exist in the Senate right now, but if the public option came up for a vote as we move ahead with reform, including under reconciliation, I would vote yes.