The New Orleans Saints and Washington Redskins kept the pressure on the Vikings in the playoff chase.  New Orleans improved to 7-and-7 on the season with a 31-24 victory over Arizona.  The Saints play Philadelphia and Chicago in their final two games.  The Redskins also improved to 7-and-7 by beating the Giants 22-10 last night.  Washington plays at Minnesota next Sunday and then hosts Dallas in the season’s final week.  The Vikings enter tonight’s game against the Bears with a 7-and-6 record.