If Puerto Ricans are not allowed to vote for the President, why doing Primaries?

Because the Electoral College is based on the number of senators and representatives the individual states have and Puerto Rico has neither, residents of that commonwealth do not vote in national elections. BUT, primaries are not national elections, in fact they are truly private enterprises sponsored by the various political parties. Primaries elect representatives to the party convention. The number of delegates from each jurisdiction recognized by the particular party is up to the party. So if the GOP wants to have delegates from Puerto Rico (or Samoa) at their convention, they can. And the PR GOP can select how those delegates are chosen and implement the method chosen. Hence a primary in Puerto Rico. And the Puerto Rican Republicans, while they have no voice in who becomes President, do have some say in who gets nominated for that office.

The short answer is because the parties wanted the voters there to.

The primary system is set up by each individual party, not the state or federal government.

The reason is because the presidential election is governed by federal law, whereas the primaries are governed by political parties.
In other words, political parties can decide who their party nominee is by whatever criteria they choose. If they want to include US territories, such as Puerto Rico - that's up to them. If they'd like to include the citizens of England, or Angola, that's up to them.

Good question.

I guess "WE COULD" have a lot of other primaries if PR sets the standard ! Currently, there are sixteen territories of the United States, six of which are permanently inhabited: Puerto Rico, Guam, Northern Mariana Islands, the U.S. Virgin Islands, Wake Island and American Samoa. Ten territories are small islands, atolls and reefs, spread across the Caribbean and Pacific, with no native or permanent populations: Palmyra Atoll, Baker Island, Howland Island, Jarvis Island, Johnston Atoll, Kingman Reef, Wake Island, Midway Islands, Navassa Island and Serranilla Bank. Uninhabited Bajo Nuevo Bank is administered by Colombia, but claimed by the United States under the Guano Islands Act.

Territories can be classified by whether they are incorporated (part of the United States proper) and whether they have an organized government through an Organic Act passed by the U.S. Congress.

They vote for their observers in Congress along with their local elections.

I was thinking the same thing.

SGT(P) (Join to see) - Spec; The short answer is so that they don't realize that they are second-class "citizens" who are living in an American colony.

An American citizen who is living in the PRC is allowed to vote in primaries and is also allowed to cast a vote for President. A Puerto Rican American citizen who is living in Puerto Rico is only allowed to vote in primaries and CANNOT cast a vote for President.

An American citizen who has never lived in the United States of America in their entire life is allowed to vote in primaries and is also allowed to cast a vote for President. A Puerto Rican American citizen who has lived in the United States of America for their entire life until they returned to Puerto Rico to live is only allowed to vote in primaries and CANNOT cast a vote for President.

You may not LIKE the use of the word "colony", but Puerto Rico is NOT a part of the United States of America it is OWNED by the United States of America and that's what a colony is.

Much the same as Hawaii was a territory of the USA, before becoming a state. But, I do agree that it is a rather confusing aspect of our policies on voting and representation of a territory.

Porque si no se les da algo de consideracion, los boricuas se van a poner mas sabrosos que nunca.