He was a neighbor in my neighborhood, Was NYPD Lieutenant when I was a teenager
We're still at war with North Korea, only agreement is a protracted cease fire...It's only treason if committed during a war, but I'm not sure there is anything preventing congress from retroactively declaring a war...
OfC we weren't in a declared war with the Soviets, but that didn't stop us from executing the Rosenbergs, so maybe it doesn't matter.