The Redskins are scheduled to visit Philadelphia on Monday night in Week 13.
A holding penalty on Norman negated a third-down stop on New Orleans's first drive, which ended in a touchdown, and prompted ESPN analyst Booger McFarland to remark that Norman is no longer the Redskins' best cornerback.
"Overall, our whole team played poorly and that's a reflection of myself", coach Jay Gruden said.
The 39-year-old passer, in his 18th National Football League campaign, needed 201 yards coming into the feature contest and reached 228 yards with a touchdown throw to Tre'Quan Smith down the right sideline as cheering supporters roared in the Superdome.
They've only played three games, but Washington's defense now ranks first in yards allowed per game (278.0), passing yards allowed per game (187.3) and points allowed per game (14.7).
Brees had 12,238 passing yards as a member of the then-San Diego Chargers from 2001-05, but his assault on the National Football League record books truly began when he joined the Saints as a free agent in 2006.
The Redskins (2-2) scored 13 points in the first half on field goals of 37 and 53 yards by Dustin Hopkins and a 4-yard run by Alex Smith after Washington recovered a Cameron Meredith fumble late in the first half.
The offense wasn't as bad as the defense, but it was more by default than anything else.
Norman's night was perfectly summed up by a video shot by Richmond Times-Dispatch sports editor Michael Phillips.
Saints officials said Brees also would hand his uniform over to the Hall of Fame after the game. Can he keep up with the New Orleans attack? "He's in charge. I respect the head man in charge". Defensive tackle Daron Payne got there first and safety Montae Nicholson cleaned up.
"Thanks to you, that's over now", Manning continued as the laughter erupted in the stands. "We deserved the penalty".