Always Divided, Never United
No President has ever received a “mandate” to govern; all elections have been very close.
Having just 52.3% of the popular vote does not mean President Elect Joe Biden has a mandate from the people.
However, he is not alone as very few Presidents have even had over 55.0% of the popular vote.
From a Presidential race perspective, we are not any more divided today than any other point in history.