Rubio is a neocon. He’ll restart the wars in the middle east and probably squander thousands of US lives trying to create democracies in Iraq and Syria.
He is an inexperienced lightweight and will be controlled by his advisors.
I agree he is light in experience. But I don’t think anyone is ready to be President, you have to live it. That has been true of all our great Presidents. I don’t think anyone is going to restart a war in the middle east right now. Will he address the problem, yes he will. I would be worried about anyone that did not listen to their advisers. ie. Donal Trump.