By that definition, anyone who harbors someone who robs a bank and shoots at the pursuing police are guilty of giving aid and comfort to our enemies.
That phrase is meant to stand alongside treason as a high crime against the nation, such as spying for a foreign nation or acting on their behalf in staging an attack against American forces.
That is not what the few people did at the Capitol building.
-PJ
We have no idea what kind of mischief Putin and others might be capable of by influencing radical right or left people. In the late 1940s Stalinists infiltrated my father’s insurance workers local. They got payoffs from management, managed to split the union into two separate organizations and destroyed the power of that union.