The raid was seen as one of Mexico's most important anti-drug operations last year.
The armed forces have started carrying out some anti-drug operations in Colombia, but most of the work there is still being done by the police.
The measure expanding the military's role in drug enforcement would allow up to $300 million to be spent by the military on anti-drug operations.
Senator Roberts wants to learn more about anti-drug operations.
Authorities of both nations on Thursday called the joint investigation the biggest anti-drug operation in history.
This was the first anti-drug operation to include Russian agents.
And they are helping smaller companies start anti-drug operations.
The joint anti-drug operation was conducted in the early morning of Oct. 28.
The measure allows up to $300 million to be spent on anti-drug operations by the military.
The helicopters may be used only for anti-drug operations.