Under current law, is there any way to force the US government to accept and secure a private key.
The laws are so convoluted I shouldn't be surprised to find some idiotic statute to exploit with a decent (expensive, connected) lawyer.
Without knowing what the endgame is, I'm only commenting for my own amusement. Depending on the purpose, social engineering sounds like it would be involved at least a little. Strictly speaking, they own the men with guns, so no one forces the government to do anything. You'd have to convince them to do it somehow, unless you possess such a disproportionate credible threat of force as to move the might of the US to acquiesce. Coercion via blackmail or even sheer trickery is usually effective.
Honestly, it's just 3 AM and I'm taking a 10-minute break from work, so BCT amuses me. I no longer come here for serious discussions, because of things like this (which is far from the most absurd thing around here anymore). Feel free to add details that explain how this is a question that actually merits response. I figure you're a few bong hits too deep into that ever-so-profound contemplative stage where you muse over obscure string theory trivia and consider its applications if the world were really all inside a wardrobe, only to arrive at the conclusion that if everyone would just become elves, we'd have world peace.