Kansas City, Mo., Mayor Quinton Lucas (D) is urging Democrats to take a hard look at competing for an open U.S. Senate seat next year in Missouri - and he may want to be their nominee.In an interview, Lucas, 36, said he has met with Democratic Party officials about mounting a campaign to replace retiring Sen. Roy Blunt (R). He said his campaign, if he decides to run, would depart from more traditional Democratic candidates who have lost.