Thompson Donald was a Northern Irish

Northern Ireland

Northern Ireland is one of the four countries of the United Kingdom. Situated in the north-east of the island of Ireland, it shares a border with the Republic of Ireland to the south and west...

 Unionist

Unionism in Ireland

Unionism in Ireland is an ideology that favours the continuation of some form of political union between the islands of Ireland and Great Britain...

 politician.

Donald was elected to the House of Commons of the United Kingdom in the 1918 general election

United Kingdom general election, 1918

The United Kingdom general election of 1918 was the first to be held after the Representation of the People Act 1918, which meant it was the first United Kingdom general election in which nearly all adult men and some women could vote. Polling was held on 14 December 1918, although the count did...

 for the Belfast Victoria constituency

Belfast Victoria (UK Parliament constituency)

Victoria, a division of Belfast, was a UK parliamentary constituency in Ireland. It returned one Member of Parliament to the House of Commons of the United Kingdom from 1918 to 1922.-Boundaries and Boundary Changes:...

 and served as MP until the constituency's abolition in 1922. Donald was elected as one of the so-called 'Labour Unionists' of the Ulster Unionist Labour Association

Ulster Unionist Labour Association

The Ulster Unionist Labour Association was an association of trade unionists founded by Edward Carson in June 1918, aligned with the Ulster Unionists in Northern Ireland. Members were known as Labour Unionists. 1918 and 1919 were the years of intense class conflict throughout Britain. This period...

. He was secretary of this group although as an MP for both Belfast Victoria and Belfast East

Belfast East (Northern Ireland Parliament constituency)

Belfast East was a borough constituency of the Parliament of Northern Ireland from 1921 - 1929. It returned four MPs, using the single transferable vote method of proportional representation.- Boundaries :...

 in the Parliament of Northern Ireland

Parliament of Northern Ireland

The Parliament of Northern Ireland was the home rule legislature of Northern Ireland, created under the Government of Ireland Act 1920, which sat from 7 June 1921 to 30 March 1972, when it was suspended...

 (1921-1925) he was effectively an Ulster Unionist Party

Ulster Unionist Party

The Ulster Unionist Party – sometimes referred to as the Official Unionist Party or, in a historic sense, simply the Unionist Party – is the more moderate of the two main unionist political parties in Northern Ireland...

representative.