Re: 52 states?
This still doesn't make any sense as Citizens in Puerto Rico can't vote for the president. If you are including territories with citizens that can't vote for the president then you also have to include Guam, American Samoa. Northern Mariana Islands and the US Virgin Islands.
So, whichever way you look at it, the number 52 is wrong. Correct statements would be:
50 States
51 Jurisdictions that can vote for the president
50 States, plus DC, plus 5 populated territories
That is before you start counting the 9 unpopulated territories or the 2 disputed ones.
I personally believe that people think that there were 50 states before Alaska and Hawaii joined the union, so now think there are 52.