Native Americans face a particularly difficult task in winning battles in American politics for all of the following reasons EXCEPT this:

a. They do not have the right to vote.
b. The status of tribes in the American political system is that of a unique form of federalism.
c. The states have been hostile to them.
d. The federal government has been hostile to them.
e. The courts have not been inclined to protect them.

a. They do not have the right to vote.