Washington state’s primary is unlikely to be called Tuesday night as an incredibly narrow margin separates former Vice President Joe Biden Joe BidenCast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response Biden tells CNN town hall that he has benefited from white privilege MORE and Sen. Bernie Sanders Bernie SandersMcConnell accuses Democrats of sowing division by 'downplaying progress' on election security The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters Why Democrats must confront extreme left wing incitement to violence MORE (I-Vt.).

With about 68 percent of precincts reporting, Biden led Sanders by just 60 votes in Washington’s primary, which will award a total of 89 delegates.

The Associated Press indicated it will not call the race Tuesday and will instead look to daily updates provided by the state government.

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All votes in the Evergreen State are cast either by mail or by dropping them off in a ballot box. After an initial update is provided on election night, election officials only provide an update once a day as they tally late-arriving ballots.

Washington’s primary will be a key test to see if Sanders can replicate some of his success from 2016, when he trounced Hillary Clinton Hillary Diane Rodham ClintonHillicon Valley: FBI chief says Russia is trying to interfere in election to undermine Biden | Treasury Dept. sanctions Iranian government-backed hackers The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters FBI chief says Russia is trying to interfere in election to undermine Biden MORE in the state’s nominating contest.

Sanders has already suffered a trio of defeats Tuesday night, losing Missouri, Mississippi and the crucial state of Michigan to Biden, all by hefty margins.