ROLL CALL: Gregory Jaczko’s Exit Poses Problems for White House. “The decision by the controversial head of the Nuclear Regulatory Commission and ally of Senate Majority Leader Harry Reid (D-Nev.) to quit Monday doesn’t necessarily end the headaches over nuclear power for the Obama administration. Gregory Jaczko, a former Reid aide and opponent of using the Yucca Mountain nuclear waste repository in Nevada, announced Monday morning that he would resign, capping months of infighting at the agency in charge of safeguarding nuclear power plants.”