those nationally in power in America?

It is not an established locution, so it is hard to say what the author means. President, Vice President, the members of the Senate and the members of the House of Representatives are the only people elected to national office in the United States. The members of the President's cabinet, the Secretaries of cabinet departments, are nominated by the President, and must be approved by the members of the Senate. No other individuals can be described as "nationally in power." I cannot say if that is what the author means. Do you know who the author is?

The author is David Rothkopf, the CEO of FP Group.
I think he might mean the national leadership. Thank you so much!