After holding the lead for a week, Rep. Mimi Walters (R-Calif.) is now trailing her Democratic challenger in Southern California's 45th Congressional District by 261 votes.
Orange County released its latest ballot count on Tuesday evening. Walters was ahead of Democratic law professor Katie Porter by 3 percent on Election Day last Tuesday, but by Monday, her lead had dropped to 1,000. The Los Angeles Times says that typically in California, the last ballots counted are provisional or mailed late, and those usually favor Democrats.
In races that have been called, Democrats won three of 14 seats held by Republicans in California.