On November 5, a New York state vote-tabulating error was discovered, which suggests that U.S. House member Timothy Bishop, a Democrat in the First District, may have lost his seat to the Republican nominee.  See this story.  Election night returns had said Bishop was winning with a margin of 3,000 votes, but now he is trailing by 400 votes.  But 9,000 absentee votes in that district remain to be counted.  Thanks to Mike Fellows for the link.