Under the interim constitution (valid from 1994 to 1996), there was a Government of National Unity, in which a member of Parliament (MP) from the largest opposition party was entitled to a position as Deputy President. Along with Thabo Mbeki, the last state president, F. W. de Klerk also served as Deputy President, in his capacity as the leader of the National Party which was the second-largest party in the new Parliament. But De Klerk later resigned and went into opposition with his party.