The Teamsters, its president's campaign, the Democratic National Committee and two political vendors are subjects of subpoenas from a House subcommittee investigating the overturned 1996 union election.

The subpoenas, issued Thursday, were necessary because several of the panel's requests for information were rebuffed or rejected because of purported contractual restrictions, said Rep. Pete Hoekstra, R-Mich.Democrats denounced the "partisan pallor" of Hoekstra's investigation, which they characterized as "taxpayer-financed muckraking."

The election, underwritten with $20 million in federal funds, was voided and the incumbent, Ron Carey, barred from a rerun after it was uncovered that had used union funds to bolster his campaign.