Since we know Washington DC has a lot of input in Hollywood, but how much Hollywood is in DC?

What I'm asking is, how much of politics is scripted? Franklin D.Roosevelt once said "In politics, nothing happens by accident. If it happens, you can bet it was planned that way."

So how much of what we see might be scripted? To keep us from seeing what's really going on? Not that there is, I'm just wondering what you think cuz I'm still trying to figure it out..