Worst known oil spill heightens debate over how to meet nation 's energy needs . NEW : Senate shelves slimmed - down energy bill , blaming conservative ##s . NEW : House says Sen. Harry Reid rushed bill through without trying to win Democratic support .
Worst U.S. oil spill heightens debate over ways to feed nation 's energy needs . NEW : Senate shelves slimmed-down energy bill , blaming GOP opposition . NEW : Senator says Sen. Harry Reid rushed bill through without trying to win GOP support .