You Do Need power plug adapter while traveling from American Samoa to Western Sahara.

Here is Why You Need An Adapter

The outlet and plug type used in Western Sahara are C and E and in American Samoa are A, B, F and I. This is how they look like.

American Samoa

In American Samoa, outlets of type A, B, F and I are in use.

Type A

Type B

Type F

Type I

Western Sahara

In Western Sahara, outlets of type C and E are in use.

Type C

Type E