Washington -- I do not like being wrong. Looking back on the journalism of the last few years, I have concluded this makes me one weird journalist. Most journalists -- in fact, most commentators -- seem to prefer to be wrong. Spectacularly, melodramatically wrong. In 2013, when I met Donald Trump for the first time, I concluded that he could be a successful politician. More than that, I concluded that if he ran for president, he would win. He was not like any other politician I have known. He was smart, aggressive and he knew enough about the issues to...