CORed
Penultimate Amazing
Nope enemies requires an actual shooting war. It's why the Rosenberg's could not be charged with treason during the cold war, and why the espionage and sedition laws were created. You can pretend that 200 years of jurisprudence doesn't matter but that would make you a total idiot.
I'm pretty sure it would have to be a declared war. At least, I believe that is why Jane Fonda was never charged with treason for collaborating with North Vietnam. Vietnam was certainly a shooting war, but the US never actually declared war on North Vietnam. In any event, I'm pretty sure that Russia does not qualify as an "enemy" of the US, at least as far as charging Trump (or anybody else) with treason for colluding with them.