MY take on what the SCOTUS may rule (IOW WILD ASS GUESS) :
They will rule in favor of the D.C. ban with the following caveat -- they will rule the 2nd Amendment is an INDIVIDUAL RIGHT, but that D.C. is a FEDERAL PROPERTY and for that reason they can ban handguns the same as a military base.
The bottom line for the other cities is that they will lose because a similar ban there would not be on Federal Property even though the SCOTUS upholds the ban in DC
This sort of ruling will render the 2nd Amendment moot. Come to think of it, the Supreme Court issued a similar ruling in consensual sodomy case not that long ago, with a similar caveat, and the rest was history...
Your logic completely escapes me. Military personnel are virtually owned by the federal government for the duration of their service. They don’t even have the same Constitutional rights as other residents of the USA, but live by the Uniform Code of Military Justice, as I understand it.
The free People of DC are entitled to ALL of the US Constitution’s protections. All of them. The Right of the People does not surround the District of Columbia, it included them. How could this be otherwise? You are baffling me.
DC is not Federal Property, not all of it anyway. Most of it is private property, and is no different than anywhere else except Congress, rather than a state or city government, has exclusive legislative authority. That doesn't mean they can pass any law they wish, just that only they can pass laws for the District.
A military base, OTOH, is government property, and the government can restrict who goes there, and the conditions under which they do so, similar to other property owners, with the "National Security" twist thrown in to complicate matters a bit.
No way they can do that under the 14th Amendment.