NEW : Secretary of state calls Rep. Tom Lantos `` a true American hero '' Lantos was only Holocaust survivor to serve in Congress . California congressman disclosed last month he was suffering from cancer . WASHINGTON (CNN) --
NEW : Secretary of state calls Rep. Tom Lantos `` a true American hero '' Lantos was only Holocaust survivor to serve in Congress . California congressman disclosed last month he was suffering from cancer . Lantos had said he would not seek re-election to 15th term in House .