Pesky old Constitution and the 23rd Amendment.
https://time.com/4296175/washington-dc-statehood-history/
DC cannot be a State without a Constitutional Amendment. What are the odds such a thing would get ratified?
Then I believe a Convention of the States is in order
https://conventionofstates.com
Must be Friday, here's the "I'm not voting unless…" shills chiming in. Fine, don't vote. Do not cry when the candidates you actually support lose. Yes yes, we know, been here since Day One, die hard conservative, Trump supporter, yadda yadda, not going to vote because (fill in blank) not done, or not soon enough