This thing is still out there? I figured it would be dead by now.
Well, NHC did declare it "dead" at 11 PM EDT on September 21, but it regenerated back to a tropical storm at 11 AM EDT on September 23. Now, the weak steering currents and its very slow southward motion over the past few days have kept it alive. It won't be going away anytime soon as it just meanders around like it's lost in the eastern Atlantic.
Nadine has been alive for two weeks now if you subtract out the time it was considered extratropical above. However, we would need to get well past three weeks to start talking about records for the longest-lived tropical cyclone in the Atlantic.