UPDATED: Reform challenger Shawn Fain has won the presidency of the United Auto Workers, the federal monitor announced today. Fain will be sworn in just in time to chair the UAW’s bargaining convention, which begins Monday.

The vote count had begun March 1, but the initial tallies were so close that final results hinged on a few hundred challenged ballots. The painstaking process to check which ones were valid dragged on for weeks.