Complex sentence: Robert A. Widenmann's post-New Mexico career took him to Great Britain, where he visited Tunstall's family, and onto New York where in 1896 he was a National Democratic candidate for U.S. Representative from New York 17th District.
Split into simpler sentences: Robert A. Widenmann's post-New Mexico career took him to Great Britain, where he visited Tunstall's family. In 1896 he was a National Democratic candidate for U.S. Representative from New York 17th District.