That is because we are looking in the wrong places.
Senators are usually well known but not very accomplished.
A president with experience in running a major state is usually best.
In times of major conflict we need a war president.
Thanks to the worldwide mess that Obama will be leaving when his term is up, we will need a president who can deal with foreign policy and various conflicts around the world.
Possibly with a VP that is experienced in domestic issues.
Unfortunately outside of two people I can think of off hand, which are Palin and Cruz, no one preaches or practices any sort of traditional American values at all.
They do not know of them, do not believe in them, just nothing.
It is as if we have thrown out everything that made this country great, and brought in everything that destroys.
I feel as if I live in an insane asylum on most days.