WASHINGTON, June 23, 2016 - Senate negotiators have reached an historic deal to set national labeling standards for foods that contain genetically engineered ingredients, according to sources. 

The deal caps off months of off-and-on negotiations between Senate Agriculture Chairman Pat Roberts and ranking Democrat Debbie Stabenow. Senators were being briefed on the negotiations Thursday morning, but the Senate would be unlikely to vote on the legislation before next week. 

The House, which passed its own bill last July, would also have to approve the Roberts-Stabenow deal but is on break until July 5. House Agriculture Chairman Mike Conaway, R-Texas, expected to be briefed on the agreement Thursday morning.

The legislation would nullify Vermont’s GMO labeling requirements that take effect July 1. 

Details of the agreement had not been released.