A couple of years vs what would amount to life for him?

He will.

witness tampering need not involve force.

it could be argued that this message has an implicit reward for his silence, such as a pardon or a job or a medal or money or whatever.

if so, that would constitute corrupt persuasion.

Funny how many people see things a bit differently once in custody.

When you show no loyalty to those who work for you, don't expect any loyalty in return from them.

Start looking at his family and he will vomit everything he knows about MFOTUS.