Generally, COTTonLINE is opposed to government monitoring people's phone calls, emails, texts, etc. unless a judge has ruled there is probable cause for the surveillance on criminal grounds. Then we see an article like this one at Yahoo News reporting former President Jimmy Carter believes the government is surveilling him.
Carter has cozied up to many questionable people around the country and around the world. A judge might well find probable cause to keep a weather eye on him.
Given that, Carter is probably wise to self-censor what he makes available for examination. I'm not sure why he believes his snail mail is safe from prying eyes.
Actually, all of us should assume nothing we share with another person is safe from surveillance. Be safe, friends, edit before sending.