The 1st Canadian Parliament was in session from November 6, 1867, until July 8, 1872. The membership was set by the 1867 federal election from August 7 to September 20, 1867. It was prorogued prior to the 1872 election. It was controlled by a majority coalition between the Conservative Party and the Liberal-Conservative Party under Prime Minister Sir John A. Macdonald and the 1st Canadian Ministry. The Official Opposition was the Liberal Party, led by Edward Blake from 1869 to 1871, followed by a vacancy in the Liberal leadership.