Complex sentence: Anglin was forced to resign as Speaker and as an MP but was re-elected to the House of Commons in the by-election that was held to fill his seat and was successfully renominated by Mackenzie to the position of Speaker.
Split into simpler sentences: Anglin was forced to resign as Speaker and as an MP, but was re-elected to the House of Commons in the by-election that was held to fill his seat. He was successfully renominated by Mackenzie to the position of Speaker.