AP:

Attorney General William Barr has authorized federal prosecutors across the U.S. to pursue “substantial allegations” of voting irregularities, if they exist, before the 2020 presidential election is certified, despite little evidence of fraud.

Barr’s action comes days after Democrat Joe Biden defeated President Donald Trump and raises the prospect that Trump will use the Justice Department to try to challenge the outcome. It gives prosecutors the ability to go around longstanding Justice Department policy that normally would prohibit such overt actions before the election is certified….

In a memo to U.S. attorneys, obtained by The Associated Press, Barr wrote that investigations “may be conducted if there are clear and apparently-credible allegations of irregularities that, if true, could potentially impact the outcome of a federal election in an individual State.”

He said any allegations that “clearly not impact the outcome of a federal election” should be delayed until after those elections are certified and prosecutors should likely open so-called preliminary inquiries, which would allow investigators and prosecutors to see if there is evidence that would allow them to take further investigative measures.

Barr does not identify any specific instances of purported fraud in the memo.

“While it is imperative that credible allegations be addressed in a timely and effective manner, it is equally imperative that Department personnel exercise appropriate caution and maintain the Department’s absolute commitment to fairness, neutrality and non-partisanship,” Barr wrote.

Update: Here is the Barr memo, and it indicates he has already authorized some investigations:

Given this, and given that voting in our current elections has now concluded, I authorize you to pursue substantial allegations of voting and vote tabulation irregularities prior to the certification of elections in your jurisdictions in certain cases, as I have already done in specific instances. Such inquiries and reviews may be conducted if there are clear and apparently-credible allegations of irregularities that, if true, could potentially impact the outcome of a federal election in an individual State. Any investigation of claims of irregularities that, if true, would clearly not impact the outcome of a federal election in an individual State should normally be deferred until after the election certification process is completed. While U.S. Attorneys maintain their inherent authority to conduct inquiries and investigations as they deem appropriate, it will likely be prudent to commence any election-related matters as a preliminary inquiry, so as to assess whether available evidence warrants further investigative steps.

(my emphasis)