CHARLOTTE, N.C. — Drew Brees and the New Orleans Saints still have one of the league’s top-scoring offenses, but lately it’s the defense that’s been carrying the NFL’s most complete team. On a night when Brees and the offense couldn’t get much going and made some uncharacteristic mistakes, New Orleans put the clamps on Cam Newton and the Carolina Panthers in a 12-9 victory on Monday night, moving the Saints into position to lock up home-field advantage in the NFC playoffs. “I believe in us, game in and game out, first quarter to fourth quarter,” defensive end Cam Jordan said.