What would it be like? Read on!
First of all, there would be no "My fellow americans" speeches. I hate those. Next, I would be unofficially dubbed as "President Badass" for my policy of 'cutting through the shit and laying out the issues in plain english', because I hate how people handle politics and I do not like the double-talk. If you wanna say something, SAY IT.
Here's how I would respond on certain important issues...
Military: "It's a funny thing. There wouldn't be all this military spending if certain people hadn't wasted it on such wonderful ideas as trying to blow up a desert for a few years. And don't even start on the whole 9/11 crap, because everyone knows that Iraq didn't have anything to DO with it."
Terrorism: "Okay, you insist? I'll tell you what I think. Terrorism cannot be destroyed. Not terrorism. It's an abstract notion that apparently nobody seems to get. You can't just blow it up. You have to find the way to make terrorists not want to do anyone harm anymore, so that the desire fades away. Read your Alan Moore books. Ideas are strictly bullet-proof."
Education: "I'm only gonna say this once. Teachers, earn your money and actually TEACH your fucking classes right. Earn those paychecks! And then, in return, when you decide that somebody should be flunked, I won't argue about it and there won't be a ludocrous program to make idiots get a passing grade. If you are DUMB, then you should be told so as a measure to force you to TRY HARDER. Unless you have a REAL learning disability certified by a DOCTOR who knows his stuff."
I'd probably make a pitch to divert the training of soldiers to the creation of a robotic heavy-armor force, because we pointlessly waste the lives of actual flesh-and-blood soldiers. Assuming I'm in a good mood, this leads me to saving the world from itself. If I'm not...then you're all fucked.