Complex sentence: He supported a proposal that the planned transcontinental railway run through Winnipeg rather than Selkirk; after John A. MacDonald was re-elected as Canada's Prime Minister in 1878, this change was accomplished.
Split into simpler sentences: He supported a proposal that the planned transcontinental railway run through Winnipeg rather than Selkirk. After John A. MacDonald was re-elected as Canada's Prime Minister in 1878, this change was accomplished.