Why do some territories of the us vote and others not vote?

Below are the annotations from H.R. Rep. No. 1698, 86th Cong., 2d Sess. 1, 2 (1960) which accompanied the original text of what became the 23rd Amendment to the U. S. Constitution, which gave to the District of Columbia, the Federal District of the United States, the right to appoint electors in Presidential/ Vice Presidential elections, making the District as much a part of the Presidential/ Vice Presidential election process as a minimally-sized state.

''The purpose of this. . . constitutional amendment is to provide the citizens of the District of Columbia with appropriate rights of voting in national elections for President and Vice President of the United States. It would permit District citizens to elect Presidential electors who would be in addition to the electors from the States and who would participate in electing the President and Vice President.

''The District of Columbia, with more than 800,000 people, has a greater number of persons than the population of each of 13 of our States. District citizens have all the obligations of citizenship, including the payment of Federal taxes, of local taxes, and service in our Armed Forces. They have fought and died in every U.S. war since the District was founded. Yet, they cannot now vote in national elections because the Constitution has restricted that privi lege to citizens who reside in States. The resultant constitutional anomaly of imposing all the obligations of citizenship without the most fundamental of its privileges will be removed by the proposed constitutional amendment. . .

''[This] . . . amendment would change the Constitution only to the minimum extent necessary to give the District appropriate participation in national elections. It would not make the District of Columbia a State. It would not give the District of Columbia any other attributes of a State or change the constitutional powers of the Congress to legislate with respect to the District of Columbia and to prescribe its form of government. . . . It would, however, perpetuate recognition of the unique status of the District as the seat of Federal Government under the exclusive legislative control of Congress.''