If you dream you went sledding with a politician, it might mean you have nurtured thoughts of socializing with powerful and famous people. Do you know the politician well? If you had previous interactions with that politician, then this dream might be a rehash of the old memories.
If you had ever thought about working with a politician as their staff, then this dream is an expression of that desire. Sledding is a mode of transport and expresses what you think would be the journey, in relation to your dream.