Records of 2 Democrats Are Subpoenaed By PHILIP SHENON WASHINGTON, May 12 - A federal grand jury has subpoenaed the files of a former executive director of the Democratic National Committee and another Democratic political consultant in a criminal investigation of Jack Abramoff, the Washington lobbyist at the center of corruption and influence-peddling inquiries by the Justice Department and Congress, the consultants say. Brian Lunde, executive director of the committee in the mid-1980's, and his consulting partner, George Burger, said in interviews that they had provided the grand jury with records for a $50,000 contract they received three years ago...