Import them once the game launches
The Inauguration Station for Saints Row IV is out now on Steam and Xbox 360 with a PlayStation Network release set for Tuesday, August 13 (or tomorrow, if you're in the UK). This is the game's standalone character creator, which lets you build your own custom president now and import them into the full game. You can even download your Saints Row: The Third character. My metallic samurai man is going to the White House!
Love when they do this. I appreciate character customization, but at the same time there's this balance you have to strike between getting all of the facial features just right and actually playing the game you've been dying to get your hands on for months if not years.