U.S. News and World Report: When asked about their views on nuclear power, President Obama and his advisers say they support it. “I believe in nuclear power as a central part of our energy mix,” Energy Secretary Steven Chu recently told Congress. The phrase, both inclusive and relatively vague, has its advantages. But now on Capitol Hill and elsewhere, there are growing doubts over just how much the Obama administration really means it. The first telling sign came in the stimulus debate, when a push to …