Complex sentence: He returned to Parliament through an 1884 by-election and was again re-elected until his defeat in the 1896 Canadian election despite this being the election that brought the Liberals back to power.
Split into simpler sentences: He returned to Parliament through an 1884 by-election. He was re-elected in subsequent elections until his defeat in the 1896 election despite this being the election that brought the Liberals back to power.