David Rehr, the former president of the National Association of Broadcasters who resigned abruptly earlier this year after the group suffered several legislative setbacks, is joining Leading Authorities, according to an e-mail sent from the firm’s president Thursday.Leading Authorities is best-known for linking advocacy associations with speakers, including former Members of Congress and political pundits.The e-mail, sent by Mark French and obtained by Roll Call, says that Rehr is joining the group “in a senior advisory capacity to help associations, chambers of commerce, and nonprofit organizations design and stage high-impact Washington Fly-Ins.— Fly-ins are lobby days that interest groups organize to bring in constituents from across the country to push the organizations’ agendas.Before joining NAB, Rehr, who has a reputation as a feisty Republicanlobbyist, served as president and CEO of the National Beer WholesalersAssociation and was a lobbyist for the National Federation of Independent Business.The e-mail from French added that Rehr would help associations raise their visibility and better prepare for meetings with Senators, Representatives and Congressional aides. In addition, Rehr will help Leading Authorities’ clients “build your members’ anticipation and excitement ahead of the event— and better “prepare Congressional offices for your members visits to their offices.—French was not available for comment, said an aide in his office Thursday, who directed questions for Rehr to another colleague. That colleague did not immediately return an e-mail seeking comment. Rehr is not currently listed on the Leading Authorities’ staff roster on the firm’s Web site.