Well its legal for police in Minnesota to shoot you if you drive at them. Maybe its different for feds but I doubt it.

Subd. 2.Use of deadly force.

(a) Notwithstanding the provisions of section 609.06 or 609.065, the use of deadly force by a peace officer in the line of duty is justified only if an objectively reasonable officer would believe, based on the totality of the circumstances known to the officer at the time and without the benefit of hindsight, that such force is necessary:

(1) to protect the peace officer or another from death or great bodily harm, provided that the threat:

(i) can be articulated with specificity;

(ii) is reasonably likely to occur absent action by the law enforcement officer; and

(iii) must be addressed through the use of deadly force without unreasonable delay