WASHINGTON, United States -- Today is the last day of Washington's presidential primary.

Ballot boxes and voting centers close at 8:00 p.m. tonight,

You can still register and or update your voter information tonight.

Mailed ballots must be postmarked by today to be counted.

Counties will begin to send results to the secretary of state after that 8: 00 p.m. deadline,

Those results are expected to be certified by March 29.