The House passed the Waxman-Markey cap-and-trade bill last Friday on a largely party-line 219-212 vote. The New York Times editorial board now urges the Senate both to strengthen and pass the House-passed bill. But the Senate is right of the House on climate, so the choice will be to strengthen or pass a bill. Senate passage would require "weakening" the bill from the standpoint of a cap-and-trade advocate. This legislative situation provides me with a great teaching opportunity about the hard choices of practical legislating.