New York Times: As the United States’ chief climate change negotiator, Todd Stern sometimes plays the bad cop, and seems to rather enjoy it. He arrived in Copenhagen on Wednesday, took a quick shower, then called a news conference, where he blasted the Chinese for not doing enough to reduce climate-altering emissions, the Europeans for demanding too much of the United States and the tiniest and poorest nations for demanding “reparations” from rich countries for their part in polluting the …