[QUOTE=JRDelirious]
The National Parties have for over a century allowed representation in the conventions of the nonstate territories – after all, the National Interest is affected and affects the interests of the residents in the territories, and until 1912, there were multiple nonstate territories within the US contiguous land borders. I know for a fact that PR was sending delegates to the conventions in the period 1904-1916, **before ** full citizenship was extended to our residents.
[/QUOTE]
The first national convention to seat a territorial delegation was the founding Republican convention, in 1856. They had compelling reason to do so–the Republican Party owed its existence to the conflict over slavery in the territories, and Republicans in “Bleeding Kansas” were on the front lines. The convention seated and showcased a delegation from Kansas Territory.
After the Civil War, other reasons emerged to seat territories–territories in that era were future states, and it made sense to get your future voters organized and invovled as early as possible. The Democrats saw the light and began seating territories in 1884.
Come the Spanish-American War, and territories became “unincorporated” and were no longer future states–not for a long time, if ever. But conventions continued to seat them, before anybody gave the matter much thought–the Philippines and Puerto Rico were seated as early as 1904. The Canal Zone, Virgin Islands, Guam, American Samoa, and (this year, Republicans only) Northern Marianas joined later.
The early caucuses in these lands were something less than exercises in mass participation. Delegations were selected by tiny caucuses of American expats, army officers, and colonial administrators. When Boston Mayor James M. Curley found himself frozen out of his home-state delegation in 1932, he contrived to get himself elected as a delegate from Puerto Rico instead.
There was a poignant moment at the 1944 Republican Convention when the Philippines was called, and reported that it was unable to send a delegation because under occupation by the enemy.
As noted above, Democrats in 1976 added a delegation for United States citizens living abroad, who often find it difficult to vote in presidential primaries and (especially) caucuses.