A bipartisan group of legislators is pushing for a broader congressional investigation of the Obama administration’s role in a 2009 decision that gutted the pensions and benefits of more than 20,000 salaried and retired auto industry employees as part of the General Motors bankruptcy settlement.

In a letter to Sen. Joseph Lieberman and Rep. Darrell Issa, the group asked “that the Committees which you chair submit additional requests for documents from the Department of the Treasury and the Pension Benefit Guaranty Corporation (PBGC) on matters pertaining to the unjust termination of Delphi Salaried Retiree pensions in the federal government’s bailout of General Motors,”