Complex sentence: With the victory of the Progressive Conservatives under Brian Mulroney in the 1984 general election, Lewis again became a parliamentary secretary until 1987 when he entered the Cabinet as both Minsiter of State to the Government House Leader and Minister of State (Treasury Board).
Split into simpler sentences: With the victory of the Progressive Conservatives under Brian Mulroney in the 1984 general election, Lewis again became a parliamentary secretary. In 1987, he entered the Cabinet as both Minister of State to the Government House Leader and Minister of State (Treasury Board).