Guys, if you’re going this route, why stop at the presidancy of the United States?
Let’s say, some watery tart lobbed a scimitar at you, which granted you extreme executive power over the masses.
What would you do with that power?
Granted, I’m not talking mind control
, but you are the world leader. What you say goes.
Unfortunately, I’m a loose misanthrope; ‘I feel I will someday die of suppressed rage at the folly of my fellow man.’
So, having me as a world leader would bound to be extremely uncomfortable for a lot of people.
Honestly, I’d have to restructure society completely, from the ground up, I’d put an outright ban on organised religion. This would have some… Slight collateral damage, I’d imagine, but oh well needs must.
After the dust had cleared from that little nugget, my next step would be to disassemble the meat and dairy industries, relocating and re-educating it’s work force into agriculture. The most efficient way in my opinion would be to stop breeding livestock, allowing their population to decline to manageable numbers.
Once this is done, I’d reestablish all of the land previously used to grow crops for livestock, instead using the space to grow food for human consumption.
In theory, this should solve world hunger, eventually, food could potentially be free, like water.
Other areas I’d take a strong look into, would be harnessing more energy, for the planet, decrease military funding, using those funds on fission, or so form of renewable energy.
Also, I’d make sure more funding was given to ocean exploration, 5% of the ocean floor is all we’ve mapped, this seems ludicrous to me. But then again, as far as I’m aware, it’s easier to go space than the bottom of the ocean. (secretly, I just want to find out what caused ‘the Bloop’ sound)
There are so many things I want to correct in the world, I could stay up on all night typing, but alas I’m tired! 
Still, it’s a hard thought experiement to carry out, simply because of the apathy it causes, when you realise, you’re ideal world will never exist. Not in this reality/universe at least! 