Do politicians have to take psych evaluation tests?

Another post made me think about politicians taking psych eval tests and so I started to wonder if you have to take such a test to be a politician. I know when my brother-in-law was going to work embassy duty he had to take a psych test. He failed. He really isn’t crazy but I think he is a bit high strung. When I asked him why he had to take the test, he said because they had to make sure the pressure of the job and his environment didn’t make him a liability to the embassy.

When you hear the crap that comes out of some politicians mouths, you have to wonder if they have a sound mind. It really doesn’t seem like anyone gets mentally tested and if they did, why wouldn’t they get tested yearly. Should we trust important information to people not playing with a full deck?

I know people also working intelligence have to take psych test, so shouldn’t politicians?
I’m assuming that they do not but if they are, then who is giving these test? Feel free to have fun with this question but if someone really knows, than please answer.