Lindsay Graham, one of the Republican senators who voted against the stimulus bill, said the nationalization of the banking industry should not be taken off the table as Congress looks for ways to shore up the teetering financial system. “This idea of nationalizing banks is not comfortable,” Mr. Graham, who is from South Carolina, said on ABC’s “This Week With George Stephanopoulos.” “But I think we have gotten so many toxic assets spread throughout the banking and financial community throughout the world that we’re going to have to do something that no one ever envisioned a year ago.”