Joshua Tucker asks: Should we take Trump seriously? Since someone serious has now asked the question, I'll get around to answering it: No, we should not.
Tucker points out correctly that it's not at all unusual for celebrities to enter U.S. politics at a fairly high level. However, it's one thing for Bill Bradley to be a Senator from New Jersey or even Jesse Ventura to win a flukish race to become governor of Minnesota, and it's a whole other deal for a guy who doesn't actually believe any of the things that Republicans believe to win their presidential nomination. Even if he sort of pretends that he does. Hell, no one is sure if Mitt Romney can win the nomination because of his original positions, and he's been consistently pretending to believe whatever he thinks Iowa caucus participants want for almost five years now.
What I will say is that traditional reporters really, really, overrate the presidential chances of very wealthy people and New Yorkers. And therefore Trump benefits from a systematic bias. Now, note that hardly anyone does take Trump seriously, as it is, with that bias, so just realize how silly taking him seriously sounds after you apply appropriate discounts.
As far as what he'll do over the course of the next several months...well, as always, I'll caution against trying to get inside the head of politicians (or, in this case, whatever you want to call him). I will point out again, however, that the presence of Trump, Bachmann, Newt, Roy Moore, Santorum, and the rest of the circus does pose a bit of an image problem for the GOP when they get around to holding debates, although remember that very few people, and almost no swing voters, watch early presidential nomination debates.