The biggest corruption scandal to infect Congress in a generation took down one of the best-connected lobbyists in Washington yesterday. The questions echoing around the capital were what other careers — and what other familiar ways of doing business — are endangered. Jack Abramoff represented the most flamboyant and extreme example of a brand of influence trading that flourished after the Republican takeover of the House of Representatives 11 years ago. Now, some GOP strategists fear that the fallout from his case could affect the party’s efforts to keep control in the November midterm elections. Abramoff was among the lobbyists most closely associated with the K Street Project, which was initiated by his friend Tom DeLay (R-Tex.), now the former House majority leader, once the GOP vaulted to power. It was an aggressive program designed to force corporations and trade associations to hire more GOP-connected lobbyists in what at times became an almost seamless relationship between Capitol Hill lawmakers and some firms that sought to influence them. Now Abramoff has become a symbol of a system out of control. His agreement to plead guilty to three criminal counts and cooperate with prosecutors threatens to ensnare other lawmakers […]