Following a bye week, Washington built a 14-0 halftime lead as Campbell threw a scoring pass to Chris Cooley and Mike Sellers scored on a 1-yard run in the second quarter.
Detroit's misery continued, as its lone score came on Jason Hanson's 39-yard field goal with 2:27 left in the third, and quarterback Jon Kitna was dumped in the end zone for a third quarter safety.
Wide receiver Antwaan Randle El caught seven passes for 100 yards, Sellers also caught a touchdown pass, and Carlos Rogers scored on a 61-yard interception return for the Redskins, who averted a two-game skid before next Sunday's contest at Green Bay.
Kitna was 16-for-29 for 106 yards with two interceptions, and Kevin Jones rushed for 48 yards on 11 attempts as the Lions lost for the 21st straight time at Washington or Landover, Md.
Notable deaths of 2014 [PHOTOS]
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