4 rows of 13 stars would look god awful.
The 23rd Amendment would be left hanging really awkwardly. I’ve heard some proposals of having Congress instruct the rump district to give its electoral votes to the winner of the popular vote, but that seems like putting chewing gum in a leaking dam.
The District constituting the seat of Government of the United States shall appoint in such manner as the Congress may direct:
A number of electors of President and Vice President equal to the whole number of Senators and Representatives in Congress to which the District would be entitled if it were a State, but in no event more than the least populous State; they shall be in addition to those appointed by the States, but they shall be considered, for the purposes of the election of President and Vice President, to be electors appointed by a State; and they shall meet in the District and perform such duties as provided by the twelfth article of amendment.
Section 1 of the 23rd Amendment
I’d welcome them and Puerto Rico if majorities in said territories support their entrance.