“On the other hand, if they were locked up, the very next Democrat President would simply grant them a full pardon.”
Sure.... you can pardon dead people killed for treason
The standards for treason are Constitutionally high enough to prevent it’s use except in the most extreme cases. No one’s been executed for treason since the Civil War. A ten-year sentence would be likely today. Espionage is treated more seriously.
“Sure.... you can pardon dead people killed for treason”
You were hoping they would be hanged? You really do need to manage your expectations!