Some U.S. Postal Service facilities failed to properly handle ballots during this year's primary elections, according to a new audit from the agency's Office of Inspector General. Election experts say the findings call into question the agency's ability to meet even greater demands for the November election that are under consideration by the U.S. Supreme Court. The audit, which is dated Sept. 4 but has not been previously reported, found a lack of training for post office staff on how to properly and expeditiously handle mail ballots, deficiencies in how ballots were tracked and errors leading to delays, all of which risked ballots having incorrect postmarks or otherwise arriving late to election officials, which could lead to their rejection.