Difference between Heir Presumptive and Prime Ministership

HEIR PRESUMPTIVE vs PRIME MINISTERSHIP: NOUN

Someone who will inherit only if no better choice for an heir is born.
See heir apparent.
An heir who stands to inherit the estate, title, or office of an intestate ancestor, but whose claim can be defeated if a relative who is closer to the ancestor is born prior to the ancestor's death.
A person who expects to inherit but whose right can be defeated by the birth of a nearer relative

Succession, Peacock throne, Kingship, Dynastic, King, Prince consort, Princeling, Monarch, Figurehead, Prince regent, Coronation, Heir, Successor, Throne, Heir apparent

Electorate, Speakership, Minister, Election, Hustings, Frontbencher, Progressive conservative party, Taoiseach, Ministerial, Parliament, Parliamentary, Presidency, Shadow cabinet, Premiership, Ministership

Succession, Peacock throne, Kingship, Dynastic, King, Prince consort, Princeling, Monarch, Figurehead, Prince regent, Coronation, Heir, Successor, Throne, Heir apparent

Politician, Electorate, Speakership, Minister, Election, Hustings, Progressive conservative party, Taoiseach, Ministerial, Parliament, Parliamentary, Presidency, Shadow cabinet, Premiership, Ministership

He is the son of Eliwood, the main character of Fire Emblem: The Blazing Blade, and heir presumptive of Pherae.
Frenchman, that he is not heir presumptive to another crown, and that he has previously taken the civic oath.
Prince Albert became King George VI and the young Princess Elizabeth became heir presumptive to the throne.
Known as "The Brat" in the Heraldic Circle, the Heir-presumptive lives up to her nickname.
Roger was made lieutenant of Ireland and was declared heir presumptive to the Crown.

Furthermore, the grassroots of the Labor Party was overwhelmingly supportive of Ms Gillard retaining the prime ministership.
But they instilled terror in her saying once you give up the prime ministership you will never get it back.
However, from the outset of his prime ministership, Turnbull was constrained by internal forces within the Coalition.
In choosing their leaders, opposition parties are effectively nominating their candidate for the prime ministership.
He was just two years into his prime ministership and still needed Hazel for appearances' sake.
Premiership to seek Prime Ministership at the centre, by running for Parliament.
During her prime ministership, and beyond, he remained truculently on the backbench.
Peter Dutton challenges Malcolm Turnbull for the prime ministership.