Complex sentence: A Reformer and advocate of responsible government, Macdonald served in all eight Assemblies of the United Province of Canada and in several pre-confederation administrations including a period as co-premier of the United Province from 1862 to 1864.
Split into simpler sentences: A Reformer and advocate of responsible government, Macdonald served in all eight Assemblies of the United Province of Canada prior to Confederation. He also served in several pre-confederation administrations, including a period as co-premier of the United Province from 1862 to 1864.