The nation's governors are being told to expect congressional deficit fighters to crowd out a traditional source of state revenues by attempting an increase in the federal tax on gasoline. New Transportation Secretary Samuel Skinner and Sen. Brock Adams, D-Wash., a former transportation secretary in the Carter administration, both told a gathering of governors Monday to expect a move in the Senate to raise the federal tax on gasoline for the purposes of easing the federal budget deficit. "There is significant pressure in the House for such a gas tax for deficit reduction," Skinner told a transportation committee of the National Governors' Association. "I would not assume or take for granted it will not be successful."