Armstrong was the delegate from Dakota Territory and was a Democrat. He served from 1873 to 1875.
Dakota Territory was a territory of the United States sending a delegate, but not a representative and senators, to the Congress.
He was previously the delegate from Dakota Territory as a Democrat from 1871 to 1873.
The information on this page is originally sourced from a variety of materials, including:
- @unitedstates/congress-legislators, a community project gathering congressional information