Complex sentence: In 1990, a junior cabinet minister from Miller's former government, Mike Harris, won the leadership of the party which was widely interpreted as a move to the political right, as Harris defeated the more centrist Dianne Cunningham.
Split into simpler sentences: In 1990, a junior cabinet minister from Miller's former government, Mike Harris, won the leadership of the party. This was widely interpreted as a move to the political right, as Harris defeated the more centrist Dianne Cunningham.