Old feud with Delahunt shadowing Keating run
US Representative William R. Keating took a political risk when he moved from Quincy to Cape Cod to run in a newly configured Congressional district. That decision put the first-term congressman in the middle of a potentially tough Democratic primary fight. But that is only part of his problem. Keating finds himself shadow boxing with another powerful Democratic political figure - former congressman and one-time Norfolk County District Attorney, William D. Delahunt. Neither will publicly acknowledge their feud, but political observers familiar with the bad blood between the two say it is as acute as it is long-running.