Associated Press: Maryland regulators say they have the right to sign off on French nuclear power company EdF’s plan to buy half of Constellation Energy’s nuclear power business for $4.5 billion. In a ruling Thursday, the Public Service Commission says the deal would give Electricite de France SA a substantial influence over Constellation subsidiary Baltimore Gas and Electric. Because of that, EdF and Constellation need regulatory approval to close the deal. At the time when the deal was …