A FEDERAL judge yesterday disqualified Davis Polk & Wardwell from representing J.P. Morgan Chase in a lawsuit seeking payment of $183 million in Enron-related surety bonds from Federal Insurance Co., a subsidiary of Chubb Corp., another Davis Polk client.

“Even in an age of convenience, for a law firm to bring a multi-million dollar claim on behalf of one corporate client against the primary subsidiary of another of that law firm’s corporate clients might be expected to raise some eyebrows,” wrote Southern District Judge Jed S. Rakoff. “In this case, it also requires the law firm’s disqualification.”