Conversation so far:
can you name the first native american u.s. senator
Charles Curtis of Kansas becomes the first Native American elected to the U.S. Senate
when was charles curtis the senator born
Charles Curtis was born January 25, 1860.
what other achievements did charles curtis achieve besides senator
Charles Curtis was an American attorney and Republican politician from Kansas, who served as the 31st vice president of the United States from 1929 to 1933.

Question: which tribe was the native american from
Self-contained rewrite: which tribe was charles curtis from