You really believe that they set it up for this guy to run in the primary because they thought he would be easy to beat in the general election, and then helped him win by doing absolutely nothing else? No web site, not campaign stops, no fund raising, no TV spots, no newspaper ads, and no interviews.
If they were smart enough to think this up, do nothing, and have him win, then the Democrats have not got a chance in hell, because Republicans can simply sit around and do nothing and still beat them. You would be a lot better off if you just let this one go, because no matter how it turns out, the Dems lose.