Do lobbyists always advocate for the interests of the members or clients employing them, or, under competing pressures, do they sometimes take positions on bills reflecting the interests of lawmakers or other lobbyists? Do they, in fact, lobby strategically by making choices that balance competing pressures in pursuit of goals like furthering their careers? Most lobbying research assumes that interest groups and lobbyists are the same, but I argue that the interests of lobbyists may be different from those they represent, which I test with a model of strategic lobbying using data on positions lobbyists took on bills in Congress from 2006 to 2017 made available by MapLight. I find that lobbyists sometimes do take positions at odds with member interests under pressure from legislators, other lobbyists, and the president, though some groups can constrain their lobbyists. I conclude by speculating on what this means for lobbying as a form of representation.