So, how exactly will this information sharing make us (or them, I'm not American) any safer?
I imagine this information sharing to be something like this:
"Hey FBI, I found this critical zero day and I think you might can use it to spy on bad guys. xxx, NSA"
"Hey Microsoft, can you please not yet patch this critical Windows vulnerability, because we're using it to hack terrorist right now. Regards CIA"
"Hey Whitehouse. Seems like we're being hacked by some kid in Russia and we have no clue how to stop him. Seems like we're screwed badly. Are you hacked too? Better have your spokesperson call it a cyberattack by a nation state, so at least we don't look stupid. Regards, Sony"
"Hey Apple, we can't really crack you iPhone security. Can you please build in a backdoor for us. Thanks, NSA"