On Moral Untenability

Once a man came to Hillel and asked him "Teach me the whole Torah while standing on one foot."

Hillel replied "That which is hateful to yourself, arrange to be done to others by an agent for a group of people that includes you. All the rest is commentary, now go and study."

If there were a bracha on being made president ...

I would know the answer, but is the rule safek neder l'kula or safek neder l'chumra?