SEATTLE — The Seattle mayoral race has tightened considerably, with challenger Katie Wilson now holding a razor-thin edge over incumbent Bruce Harrell.

As of a Monday afternoon update from King County, Wilson has 49.83% of the vote, while Harrell trails closely at 49.79%. That puts Wilson ahead by just 91 votes, 133,469 to Harrell’s 133,378, in the latest count.

Harrell had a more than 10,000-vote lead on Wednesday and was up by 8 points, but that lead evaporated as election day ballot box votes were counted. Wilson cut the lead to 4300 votes on Friday and has now eliminated the gap to take the razor-thin lead.

King County Elections counted 100,000 ballots that were added to the overall total, with about 38,000 coming from Seattle. King County Elections said there are roughly 6400 ballots left to count, with 1700 outstanding signature challenges.

A recount is triggered “if the difference between the candidates is less than one half of one percent and also less than 2,000 votes,” and a manual recount is done if “the difference between the candidates or responses is less than one quarter of one percent and also less than 1,000 votes.

Political analysts note that in Washington state, ballots returned on or just before Election Day often skew more progressive. That trend may be fueling Wilson’s late surge. Despite trailing in early returns, the self-described socialist has remained confident she is on a viable path to victory.

In the August primary, Wilson finished ten points ahead of Harrell. Both candidates campaigned on similar priorities, with public safety and the homelessness crisis topping their agendas. Wilson argued that Harrell has already had his chance to address those issues as mayor.

“We are in this moment where people are looking around and not seeing the progress on the homelessness crisis and public safety that they hoped to feel over the past four years,” Wilson said.

Harrell, meanwhile, said his administration is making progress every day and has proven to be “agents of change.”

“I think we presented a strong platform and are the most qualified and prepared for this job,” Harrell said. “We recognize that many people remain unhappy with the conditions they see, and we have to empathize and see it through their lens.”

King County Elections said updated results will be posted daily around 4 p.m. until all ballots are counted.