# Mercury Public Affairs A large bipartisan public-affairs and lobbying firm that nonetheless carries one of the deeper Trump-world benches on K Street — included here as a right-leaning-bench example rather than a purely partisan shop. ## Scale Mercury reported roughly **$19.1 million in the first three quarters of 2025**, more than double its take over the same period a year earlier. Much of the surge tracked corporations and foreign governments seeking help navigating Trump tariff and trade policy. ## Trump-world ties Mercury previously employed current White House Chief of Staff [[Susie Wiles]], who served as a co-chair before joining the administration. The firm designates Trump-connected partners to its most sensitive accounts — including [[Bryan Lanza]], a former Trump campaign communications director and transition alum, and [[David Vitter]], a former Republican U.S. Senator from Louisiana. A representative 2025 [[FARA]] client was the government of India, which retained Mercury amid U.S.–India tariff tensions. Mercury sits in the same revolving-door network as [[Ballard Partners]] and [[Continental Strategy]]. ## See also [[Lobbying Hub]] · [[Bryan Lanza]] · [[Revolving Door]] · [[FARA]] · [[Lobbying]]