Kooky deranged people become leaders of countries all the time.
Most often they do it with the already organized base of some kind of religion.

In Hitler's case they made up a religion and legendary myths after they gained power.

The kooky deranged politicians almost always sound ultra patriotic and kind with the best interests for the people and once in power the scourges and arrests begin.

If you are thinking of ruling out Michelle Bachman or her like,
do not count on it.
What religion as a base does not provide a magority, racists and xenophobes will make up for. (along with new stringent voting priviledge laws which will only effect democratic voters.)