In the latest twist, Herbalife has added the help of the firm run by power broker Tony Podesta to its roster of star lobbyists that already includes Moses Mercado and Dean Aguillen of Ogilvy Government Relations, and Thomas Downey and Ray McGrath of Downey McGrath Group. They are largely playing defense against the lobbying and public relations offensive launched by Ackman’s Pershing Square Capital Management — which has hired lobby firms Wexler & Walker and Moffett Group, in addition to its longtime PR agency Global Strategy Group.