New Google "filter" ?

In the latest dec updates, I was deranked (3pos - not ranked) by a main keyword on an EMD domain only in USA geo. Only one keyword.

I think links from websites with high USA traffic can help me get back at least to top10. But I don't know, maybe someone else experienced same situation.

Yes. I think this is a good idea. You can also publish some new pages with fresh content, this is also a good trick.

It's good idea.