Laments such as this one from James Traub always bug me:
The president who once made an open-handed offer to the world now delivers a harsh challenge. The president who once fixed his gaze, and that of his audience, on the global problems looming on the horizon now speaks of urgent crises requiring instant action. The tribune of hope and change now speaks modestly of hitting singles and doubles. The president has been well and truly mugged by reality.
Wake up America! Barack Obama was always a realist masquerading as an idealist not the contrary! He hasn't changed, he is being himself because you married him twice and he no longer has to pretend that he is the one, your prince charming!