 Complete the following phrase:  In 1880 he ran once again for Congress, again winning the Republican nomination and general election to represent Iowas 7th congressional district in the U.S. House. Once again, he was re-elected. His final period in Congress ended in 1884, when he was appointed Envoy and Head of the U.S. Legation at Berlin, Germany by President Chester A. Arthur. He served in that position until 1885, when he was named as a special envoy to the 