us non astrologers what that means for Joe Biden, our country, & the Planet?

no signatures for any aspect as proven by studying the charts of multiple birth siblings.

The best all around I can give is the time portends profound changes for the United States, positive or negative depending on co-transits, progressions, and eclipses, to the Sibly chart.

For president Biden a term with great successes and great challenges.

For the average citizen the changes will be experienced as 'good' or 'bad' depending on their personal desires for the direction of issues at hand.

I've been a little concerned about when Saturn goes into Aquarius & squares Biden's Planets in Scorpio and his Moon in Taurus

And, the USA's chart which I've read has her Moon in Aquarius.

When someone posted Sen. Harris' natal chart...

They are both Scorpios, something I know a whole bunch about being a Sun sign Scorpio myself. What's even more interesting is that they are both what I call "cusperettes" meaning their natal sun placement is within 3 degrees of the cusp of two signs. Even more interesting is that Joe's natal sun is at the final degree of Scorpio while Kamala's is in the first degree of the sign. I haven't seen Joe's natal chart but I have seen Kamala's and she has the same situation I do which is Sun not only at the first degree of the sign but there is a planet conjunct the sun only in Libra, she has Mercury in that location*.

These points are significant as Scorpio is the sign of death/rebirth.

Joe represents the old ways of our country, culture and national trajectory and is soundly represented by his Sun placement where Kamala represents the new path we must embrace to move forward as a people, as a nation. I think they are a powerful set to enter the White House at this time and I think they will be able to meet and address a whole bunch of stuff that needs review and change. Some of it will happen on its own in some ways but they will be able to guide where and how much of it takes place. They being of the same sign can represent that they are very tight in their thinking and could probably communicate telepathically if they tried.

*This, to me, shows that she is a master at communication but can also look deep into a person's being, it's probably what helped her become a successful prosecutor.

Just my two cents so far.