Aetna CEO Mark Bertolini, who has been critical of Obamacare in the past and whose company has withdrawn from all its exchanges, said Thursday that he believed Obamacare could be repaired.

“Nobody would fix it,” Bertolini said about Obamacare, speaking at the U.S. News & World Report Healthcare of Tomorrow conference in Washington. “If you were to leave Medicare alone for seven years or eight years it would fall apart. Just like this is. We need a bipartisan approach.”