Question is unclear - he hasn't resigned from any positions several times.
Stephen Harper will likely resign following a vote of non-confidence by a recently elected House of Commons, or if he sees that a vote of non-confidence is inevitable following a federal election. He could also resign if he looses the confidence of his party.
Stephen Harper became the Prime Minister once in 2006. He has continued to be re-elected in 2008, with an election pending in 2011. So far he has not had to resign as Prime Minister.
That is the correct spelling of resign (to quit a position).
The mayor chose to resign once the scandal was made public. I intend to resign my current position and open my own business.
yes
You can resign from the position upon providing a full accounting of your actions in regards to the estate.
Yes.
That is the correct spelling of resign (to quit a position).
He will resign from the position of Senator and the Governor of Illinois will appoint a replacement for him.
I believe it was because he was asked to resign after his anger management issues got out of control and coworkers were afraid to work with him.
Because he had Political differences between cabinet members
The abstract noun forms for the verb to resign are resignation and the gerund, resigning.