You don't.
A large swath of Americans have made it clear they don't care to pay attention and won't care until it personally affects them.
So we're simply going to have to watch our nation decline until the majority of Americans have personally been affected. Then we'll begin a long, difficult path to gaining back what we lost, just to get back to where we were before the decline happened. Then we'll be happy to be back in the same shitty situation we were before and probably let things slide back into a decline again.
Americans are stupid. And there's nothing you can do to change that.