Zoltan Istvan does, and he's running for president to prove it. No, he isn't the robot, but he thinks in 30 years we could have one that's intelligent enough, and so he's laying the groundwork now.
Istvan is the founder of the Transhumanist Party. Transhumanism basically says that at some point in the future technology will get so advanced it will either replace humans entirely, or we'll merge with it and become like a new species.
Speaking to Esquire, Istvan explains why he thinks a robot should be president:
I have advocated for the use of artificial intelligence to potentially, one day, replace the president of the United States, as well as other politicians. And the reason is that you might actually have an entity that would be truly unselfish, truly not influenced by any type of lobbyist.
He goes on:
[I]f you have a machine, you will be able to program that machine to, hopefully, benefit the greatest good, and really go after that. Regardless of any personal interest that the machine might have. I think it's based on having a more altruistic living entity that would be able to make decisions, rather than a human.