(Washington, DC)  --  Washington's junior U.S. senator says the nickname of the NFL franchise representing the nation's capital is an "insult."  Senator Maria Cantwell and Oklahoma Senator Tom Cole have written a letter to NFL Commissioner Roger Goodell, saying the league is on "the wrong side of history" when it comes to the "Redskins" nickname.  Cantwell, who chairs the Senate Indian Affairs committee, and Cole told Goodell they object to his recent news conference, during which he said the Redskins name has been "presented in a way that honors Native Americans."  An NFL spokesman says the league will respond appropriately to the letter after reviewing it.