Rothenberg said a union endorsement is important because polling shows many UAW members are often undecided in the spring before a presidential election.
Biden wooing blue-collar vote, to speak at United Auto Workers' political convention
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Brian Rothenberg, a former union spokesman who now is a public relations consultant, said all UAW presidents struggle over when to take a company offer to members to end a strike.
UAW's confrontational leader makes gains in strike talks, but some wonder: Has he reached too far?
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