[ABC canceled the hit sitcom “Roseanne” hours after Ms. Barr’s racist tweet.]

In another tweet, Ms. Barr accused Mr. Soros of wanting to “overthrow” the United States by backing candidates for district attorney “who will ignore U.S. law & favor ‘feelings.’”

Ms. Barr also retweeted a user who asserted that Black Lives Matter and anti-fascist activists are Soros-sponsored front groups. The user referred to Mr. Soros as the “terrorist in chief.”

The assertions about Mr. Soros that appeared throughout Ms. Barr’s timeline are baseless. Even the conservative National Review, while critical of Mr. Soros, has called the Nazi smear a “slander.”

In a statement in response to her tweet, a spokesman for Mr. Soros called her claims insulting.

“George Soros survived the Nazi occupation of Hungary as a 13 year old child by going into hiding and assuming a false identity with the help of his father, who managed to save his own family and help many other Jews survive Holocaust,” the statement read.