Barr Acknowledges Justice Dept. Has Found No Widespread Voter Fraud

“Most claims of fraud are very particularized to a particular set of circumstances or actors or conduct. They are not systemic allegations, and those have been run down; they are being run down,” he said. “Some have been broad and potentially cover a few thousand votes. They have been followed up on.”

The Trump campaign and its surrogates have filed dozens of lawsuits in battleground states that have offered an array of attacks on the election results: arguing that mail-in ballots were illegally used, that absentee ballots were improperly counted and that poll challengers were denied proper access to monitor vote counts.

Some of the lawsuits have echoed Mr. Giuliani’s talk of conspiracies that foreign powers like Venezuela worked with corrupt American officials to manipulate voting machines. Others made much smaller claims, contesting the validity of tiny batches of as few as 60 ballots.

But none, at least so far, have won Mr. Trump anything more significant than the ability to move his poll observers from 10 feet to six feet away from workers counting votes in Pennsylvania. The campaign and its allies have now lost nearly 40 cases across the country as judge after judge — including some appointed by Mr. Trump — discredited the efforts as lacking both legal merit and convincing proof.

Mr. Barr also suggested that lawsuits or audits by elections officials served as remedies for suspicions of election irregularities, not criminal inquiries. “There’s a growing tendency to use the criminal justice system as sort of a default fix-all, and people don’t like something, they want the Department of Justice to come in and ‘investigate,’” Mr. Barr said in the Associated Press interview.

Mr. Barr has potentially placed himself in a precarious position with Mr. Trump, who recently fired Christopher Krebs, the senior cybersecurity official responsible for securing the presidential election, who prominently disputed Mr. Trump’s false claims that the presidency was stolen.

“I guess he is the next one to be fired since he now, too, says there is no fraud,” Senator Chuck Schumer of New York, the top Senate Democrat, said of Mr. Barr. The attorney general traveled to the White House on Tuesday afternoon, prompting speculation about his future, but he was there to attend a previously scheduled meeting, a spokeswoman said.