Frank Lautenberg, the 86-year-old senator from New Jersey, has been diagnosed with treatable stomach cancer and will begin chemotherapy today. Lautenberg’s chief aide announced that Lautenberg will finish out his current term—his fifth in the Senate—and that he still plans to run for reelection in 2014. “We expect a full and complete recovery for Senator Lautenberg,” Lautenberg’s oncologist said in a statement. “The senator will be treated with chemotherapy administered approximately every three weeks. We anticipate that he will receive between six and eight treatments, and in between treatments, the senator is expected to be back at work in the Senate.” Questions arose about Lautenberg’s health after he was hospitalized on Monday.