Some people have been placing bets for which republican candidate will gain the most from the ISIS attacks in Paris. They're (almost) all wrong, however. The candidate who will gain the most from this is the one who will most blatantly exploit it for personal gain. The candidate who will gain the most from this is the one who will most enthusiastically rally the troops for his personal cause as being connected to what happened. The candidate who will gain the most from this is the one who finds the best way to structure a response in the framework of his personally ideology while also using that ideology like a giant baseball bat to pummel his opponents.
That candidate, is, of course, Rand Paul. Sure the others have larger war chests currently but none have as dedicated of followers. Nor do any of them excitedly tell us the virtues of fascism. Rand will happily tell us how allowing employers to force employees into mandatory war conscription is the only 'solution' that won't increase the national debt. Rand will happily tell us how reducing corporate tax rates (to zero or less) will bring about lasting justice and awesomeness.
That's right people, come get your fascism.