Tom DeLay may be a wild thing on the dance floor, but when it comes to boosting ratings, he seems to have two left feet. The controversial former Republican congressman was supposed to spice up this season of “Dancing With the Stars,” but it hasn’t worked out that way. In fact, the dance-competition show, a bulwark of ABC’s schedule for more than four years, is shambling through its worst season since it first premiered in the summer of 2005. DeLay — who created a mild sensation during premiere week when he and partner Cheryl Burke did the cha-cha to “Wild Thing” — dropped out last week because of injuries, joining Debi Mazar, who was voted off. That will leave this season’s fate in the hands of such remaining lumin  ries as Donny Osmond, Kelly Osbourne and Melissa Joan Hart. The ratings pose a worry for ABC, which has been helped through some very difficult times by “Dancing.” Last year, when executives brought back several second-season Continue reading →