term for the president as the leader of his or her political party.
yes
They do not have a president as such however they do have party leader and the current scotish party in power is the scotish national party is Alex Salmond.
Party Leader
That role would be party leader-- the leader of his political party.
President Harry S. Truman.
Ed Milliband has just been elected leader of the Labour Party. It hasn't got a president.
Alexander Hamilton was a political leader but was not born in the US and could not be President. The Communist Party was outlawed at one time and its leaders could not run for President .
Because you are a monkey
Abraham Lincoln
The President is traditionally the leader of his or her political party.
In The American President, the president has the role of commander in chief, chief diplomat, chief legislator, political party leader and a world leader.