The British Labour Party leadership election of 1961 was held when, for the second year in succession, the incumbent leader was challenged for re-election.

Furthermore, this degree of loyalty to the incumbent leader, whatever the government structure may be, is called the Loyalty Norm.

This was the first time in the history of the Labor Party that an incumbent leader was elected unopposed at a leadership ballot.

They have a son and two daughters - one of whom, Philippa, is the incumbent leader of Westminster City Council.

China's retired elders often are given latitude to explore delicate topics that incumbent leaders shy away from.

Traditionally in most Canadian political parties, there was no mechanism for a political party to forcibly remove an incumbent leader.

O'Kennedy supported the incumbent leader throughout the heave and took over as Minister for Labour in the subsequent reshuffle.

Andrey Safonov, one of the opposition candidates, suggested that election results were rigged in favour of the incumbent leader.

Peretz narrowly defeated Peres, the incumbent leader, in the election on 9 November 2005.

As the incumbent leader, Mrs Thatcher possessed the advantage of having the support of the party machine.