From the U.S. Senate official website:

"S. Amdt. 2797
"DORGAN Amendment to H.R. 3074
"Amendment Purpose:

"To PROHIBIT the establishment of a program that allows Mexican truck drivers to operate beyond the commercial zones near the Mexican border."

This was co-sponsored by Sen. Specter and five others. So, unless there is another "Dorgan Amendment", this amendment just stops the Mexican Pilot Truck Program rather than dealing with funding. Or perhaps this is a second "Dorgan Amendment"

See http://www.senate.gov/

"Floor Schedule - Tuesday, September 11, 2007
"Convene and resume consideration of H.R. 3074, the Transportatation/HUD Appropriations bill for fiscal year 2008",
top right.