Should we take responsibility now, and all work together to secure the strength of our nation?

Frankly, I think it is too late. I believe that the US no longer has the cultural glue of respectful communications or the political will to make good choices as a nation. To put it another way, too much politics and almost no useful governance, for a couple of decades now.

We can still improve the nation. But I think the best approach is to work as individuals, companies, and communities to do well for ourselves, our loved ones, and our associates. If this works over time - and I'm thinking decades, at least - then maybe a national renewal will become possible.