“Mr. Obama has not been a leader on big causes in Congress. He has been manifestly unwilling to expend his political capital on urgent issues. He has been only an observer, watching the action from a distance, thinking wry and sardonic and cynical thoughts to himself about his colleagues, mildly amused at their too-ing and fro-ing. He has held his energy and talent in reserve for the more important task of advancing his own political career, which means running for president.”