No only has he reinvigorated NATO, they may decide they don't need us any longer. He blabs to our enemies and insults our allies. He's a shining light of hocus pocus opiate for the tea bagger types.
That's certainly possible now that the Soviet threat has been eliminated and Europe more or less united. Moreover I suspect the EU organization, absorbed in its own ambitions for its power through "ever closer union", would like to see the NATO national security relations with the US leave the stage. However the world remains a dangerous place, and Europe now faces new, emerging threats from the South, along with a still unruly Putin. As a result, I doubt they will act on it. Frankly Europe needs us far more than we them, and their unwillingness to adequately fund a defense establishment makes them a rather needy and dependent partner. The best thing for the United States would be a strong relationship with a still vigorous Europe: absent that, no treaty at all is better than the remaining alternatives.