CQPolitics: With the House set to take up a sweeping global warming bill later this week, President Obama weighed in Tuesday with an endorsement of what he called "historic" legislation that will "transform the way we produce and use energy in this country." "It’s a bill that will open the door to a better future for this nation," Obama said. The president’s comments at an afternoon news conference were part of an intense lobbying push by the White House and interest groups to win over …