Reuters: U.S. energy reform has stalled now that the Democrats have lost their filibuster-proof majority in the Senate and Republicans drift to a more negative position, a top industry executive said on Saturday. “What I see is a series of disjointed, piecemeal approaches that will not yield the optimal solution,” Exelon Corp Chairman John Rowe said in remarks prepared for a conference at the Massachusetts Institute of Technology. A cap-and-trade system or a carbon tax are the only …