Some 30,000 absentee ballots in Milwaukee need to be recounted, likely delaying the results in the key swing state of Wisconsin, election officials said.

From the polling place to the courtroom, ABC News tracks the latest election security developments as experts warn about the spread of misinformation and disinformation from within the U.S. and abroad.

NBC News' Shaquille Brewster reports from Milwaukee, Wisconsin, where thousands of absentee and early ballots are set to be recounted after some state officials noticed some vote tabulator machines were not properly locked.