DETROIT, June 17 (Reuters) - The federal monitor

overseeing the United Auto Workers union has found that its

president, Shawn Fain, retaliated against the union's

secretary-treasurer after disagreements over spending.

Secretary-Treasurer Margaret Mock had some of her duties

reassigned for her refusal or reluctance to authorize certain

expenditures for Fain's office, New York attorney Neil Barofsky

said in a report released on Tuesday.

"Fain acted on a premeditated plan to take action against

Mock," it stated.

The report called for the union's executive board to

reinstate the various responsibilities stripped from Mock, which

included purchasing, benefits and pensions.

Fain has been credited with leading a resurgence in union

power across the country during a 2023 strike against the

Detroit Three automakers, Ford, General Motors ( GM ) and

Stellantis ( STLA ).

But the report could deal a blow to his reputation, with

Barofsky also citing instances in which Fain yelled and swore at

Mock or other UAW members.

Mock urged other executive board members to accept the

monitor's recommendations.

"Let's put these internal issues to rest and focus on the

fights that really matter," she said in a statement. "In unity

and solidarity, let's work together to confront employers and

uncaring politicians who choose to wage war on the working

class."

The UAW and Fain did not immediately respond to a request

for comment.

Fain's office had also accused Mock of obstructing union

operations and seeking to influence board votes, claims that the

report said were unfounded.

The monitor was appointed in 2021 following a years-long

corruption scandal that resulted in the federal convictions of

several former leaders.

He has since regularly released reports on his team's

investigations into the union's practices. The investigation

into allegations about Fain's and Mock's actions was opened in

February 2024.