Complex sentence: Rhodes took over the party and led it to victory in the 1925 election defeating a Liberal government that had been in power for forty-three years but had been in its last years wracked by an economic downturn and severe labour unrest among miners in Cape Breton.
Split into simpler sentences: Rhodes took over the party, and led it to victory in the 1925 election. The Conservatives defeated a Liberal government that had been in power for forty-three years but had been, in its last years, wracked by an economic downturn and severe labour unrest among miners in Cape Breton.