Complex sentence: As a result many Puerto Ricans, with the exception of women, became eligible for the military draft, however they were and still are not permitted to vote for the President of the United States who is also the Commander in Chief of the armed forces.
Split into simpler sentences: As a result many Puerto Ricans, with the exception of women, became eligible for the military draft. However they were, and still are, not permitted to vote for the President of the United States, who is also the Commander in Chief of the armed forces.