President Bush is trying to do so, it appears. Quote: "President Bush assured the rest of the world today that he takes climate change seriously and vowed that the United States "will do its part" in crafting "a new international approach" to reduce the greenhouse gases that are warming the planet."
Great! But then comes the next line: "However, he proposed no new initiatives to do so." Slam!
And even if he had done so, many environmentalists would have denounced them as insufficient, too late, not enough, etc etc etc.
Fundamental: when Republicans reach out to liberals or progressives or to the left--when they try, that is, to be "moderate"--it never works. In fact, i'd argue it only earns them contempt from the very persons to whom they try extend a hand.