Art. II

No person except a natural born citizen, or a citizen of the United States, at the time of the adoption of this Constitution, shall be eligible to the office of President; neither shall any person be eligible to that office who shall not have attained to the age of thirty five years, and been fourteen Years a resident within the United States.

Complicated 18th century English notwithstanding, BoJo will need to relocate his domicile and register to vote before he's ready to nominate himself to the uniparty.

Also, he should bring a wad of dough to feed attys.

Diversity is the key to economic and political evolution.