The Associated Press announced Thursday that it is unable to declare a winner in the Iowa caucuses, two days after the caucus ended with a significant delay in the results being released. “The Associated Press calls a race when there is a clear indication of a winner. Because of a tight margin between former Mayor Pete Buttigieg and Sen. Bernie Sanders and the irregularities in this year’s caucus process, it is not possible to determine a winner at this point,” Sally Buzbee, AP’s senior vice president and executive editor, said in a statement. Caucus results are typically announced within hours, but a coding error in a reporting app resulted in about 60 percent of the results being reported on Wednesday. More results have been posted since, but Democratic National Committee chair Tom Perez called for a recanvass on Thursday.