His kitchen cabinet includes some of the most prominent Republican lobbyists in Washington, including Charles R. Black Jr., the chairman of Prime Policy Group and a lobbyist for Walmart and AT&T; Wayne L. Berman, who is chairman of Ogilvy Government Relations and represents Pfizer, the drug manufacturer; and Vin Weber, the managing partner for Clark & Weinstock…

Other lobbyists serve on one of Mr. Romney’s policy advisory teams, have hosted fund-raisers for his campaign or have joined the many influential Republicans whose endorsements Mr. Romney’s campaign has hailed. Among them are David Wilkins, a former United States ambassador to Canada who lobbies for the Canadian oil industry, and Stephen Rademaker, a former State Department official who lobbies for the defense contractor General Dynamics…

A spokeswoman for Mr. Romney did not respond to requests for comment. In an era when K Street firms serve as holding pens for political operatives and landing pads for retired lawmakers of both parties, the profusion of lobbyists around Mr. Romney’s campaign in part reflects the growing embrace of his candidacy by the Republican establishment, including most of the party’s elite donors and dozens of members of Congress.