not only the saturn return eventually in the next decade or so we will have a pluto return, and theres a lot of other aspects in the chart all being highlighted at once.
usa s birth chart has pluto in capricorn, in a wide applying square from saturn in libra, and with uranus now in the mix too....
this is a good in depth article about the us chart, its a bit thick with astrospeak.
and some more, theres a lot of articles about this.
i generally use the november date rather than july 4 date to draw the countries chart. there are different opinions about which one to use, but the independence of the country from england (july 4, 1776) was different than when the usa became a country(the articles and paperwork which laid out the basics of the government- november1777), so when that actual date was, and exact time, is a disagreement among astrologers.
other countries dont have this, their charts are commonly accepted as being accurate with clear dates and times.
that date as the birth date of the country, rather than the july 4th date seen more commonly when astrologers do work on the chart, would make america instead a scorpio sun sign (the eagle/phoenix) with a gemini moon (duality- east/west north/south) and humanitarian and idealistic aquarius rising.
the other is fitting too- the july 4th chart showing america with a sun sign cancer, sag rising, and an aquarius moon. so its hard to say one is more relevant than the other. if you go by the alternate, usa has saturn in early scorpio and wont have the return for another year or three years (?)....they are similar charts being within the same general time period and have the same transpersonal planet placements.
heres the alternate version, or at least one of them:
The Scorpionic America Chart
Nov. 15, 1777, 12:46pm EST in York, PA (39N58, 76W44)
there are a couple of other alternate versions too...on the july fourth date people have disagreements about the exact time. making america either have gemini, sag, or scorpio rising