Vermont independent senator and 2020 presidential candidate Bernie Sanders underwent surgery for a blocked artery after he complained of chest pain at a campaign event in Las Vegas Tuesday night. Sanders’s campaign says the senator had two stents inserted into an artery — a common procedure that’s performed more than a half-million times a year in the United States. Patients are typically released from the hospital a day or two after the procedure. Sanders’s rivals for the Democratic nomination issued statements of support, as did many members of Congress. In a tweet Wednesday, Senator Sanders thanked his well-wishers and said he was feeling good. He added, “I’m fortunate to have good health care and great doctors and nurses helping me to recover. None of us know when a medical emergency might affect us. And no one should fear going bankrupt if it occurs. Medicare for All!”