Dr. Sanjabi emerged in the late 1970's as the leader of Iran's principal opposition party, the liberal and centrist National Front.

In Pando, the party narrowly lost the Movement towards Socialism in state elections, and now forms the principal opposition.

In the immediate postwar period as the franchise was again extended, and as Labour emerged as the principal opposition, so Conservatives retrained their guns.

But they also installed as the principal opposition in the three places political parties that have the breakup of the union as their final goal.

The principal religious opposition to birth control came from the Roman Catholic Church.

The principal opposition to Pitt was a relatively weak faction of Whigs, led by Charles James Fox.

The principal opposition came from unions representing court officers.

Woking has historically been a Conservative safe seat, with the Liberal Democrats being the principal opposition in the last five general elections.

As the Labour Party is the principal opposition, it gets to choose most or all of the eight opposition Senators.

The principal opposition to the Liberals was the Progressive Conservative Party led by Robert Stanfield.