So... there is this thing called the executive function of the brain. The purpose of the executive function is to prevent us from doing stupid things that seem appealing. Like, if you're about to fuck a prostitute with syphilis, the executive function is like "well she looks like she knows her way around a guy's junk, but I probably don't want a venereal disease ". The executive function helps you make better decisions like "that bacon wrapped donut looks delicious, but I probably shouldn't eat it" or "I enjoy a lack of air while pleasuring myself, but auto-erotic asphyxiation is probably stupid."
Which is why I have to face palm when people look at a candidate like Palin or Trump and say "Oh he speaks his mind! We should vote for him!" Because I don't want a president who says the first thing that comes to their mind. I don't want a president who makes decisions based on their guts.
What I want is a president who has the self awareness to reflect on their impulse and figure out whether it's a good idea. For example, a president who realizes that threatening the moderator of a debate makes him look like a petty person who can't tolerate the criticism that will come with the office, or someone who realizes that a menstruation joke probably isn't the best way to defend this action. Or someone who makes sure they have the data to back themselves up when they make statements about how Mexico is sending all of their criminals to the US.
Basically, I want someone who realizes the limitations of their impulses, reflects thoughtfully upon them, and when necessary, draw upon additional sources to confirm or deny their impulses. We need someone capable of making good decisions, not someone who stomps their feet when he doesn't get his way. In other words, I want an executive with a strong executive function.