Attorney General William Barr has given the Justice Department the go-ahead to investigate any “credible” claims of voting irregularities—which President Trump has repeatedly insisted cost him the election despite zero evidence, the AP reports. Just two days after Joe Biden clinched the White House—winning with a sizable lead in several battleground states—the attorney general wrote in a memo to federal prosecutors that probes “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.” A press release from the Department of Justice noted that in election fraud cases the public integrity office would be consulted. A source familiar with the matter said the Department of Justice had received and was looking into a referral from the Nevada Republican Party alleging thousands of cases of voter fraud and an affidavit from a Pennsylvania postal worker obtained by Sen. Lindsey Graham (R-SC) alleging voting irregularities.

Trump has alleged since Election Day that Democrats are behind a nefarious scheme to get him out of the White House. The Federal Election Commission has said there was “no evidence of fraud,” with commissioner Ellen Weintraub telling CNN, “There is no evidence of illegal votes being cast.” The Trump campaign has launched multiple lawsuits in several battleground states that have mostly proven unsuccessful, with judges calling Republicans out for making unsubstantiated claims.