Democrat Joan Buchanan appeared to have won Assembly District 15 by about 10,000 votes early Wednesday, but there was no official concession yet from the campaign of Republican Abram Wilson.

With 100 percent of the precincts counted, Buchanan had 99,833, or 52.9 percent of the vote, to 89,013, or 47.1 percent, for Wilson.

Matthew Del Carlo, Wilson's campaign manager, expressed hope earlier that the numbers could still move his candidate's way because Contra Costa County, where Wilson is mayor of San Ramon, had yet to be counted.

"What's odd is that it's very similar to how the votes were counted in the primary," Del Carlo said. "It may be tomorrow before we know."

Though Alamo, where Buchanan is from, is also in Contra Costa County, Del Carlo said Wilson is better known as the mayor of a city than a school board member like Buchanan would be. Wilson also got more endorsements from Contra Costa, he said.

Del Carlo said there were also reports from the parts of the district in Contra Costa and Alameda counties of late robocalls that attempted to discourage Republicans from voting.

Similar calls were reported in neighboring Assembly District 10, near Sacramento, and elsewhere in the state. Del Carlo said it was possible the calls may have suppressed some Republican votes, because the voice on the calls, which came at about 5:30 p.m., said the presidential race had already been decided.

"It's kind of said they try to undermine the vote like that," Del Carlo said.

A call left for Buchanan's campaign was not returned Wednesday morning.

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