That's a huge stat. It can't be too hard for incumbents to out perform themselves in say 25 states (assuming you didn't cause economic collapse or needless war), but increasing your vote totals in every state is exceptional. It shows that you had an incredibly popular message. Most importantly it shows that your performance in these four years convinced a diverse and expansive portion of the country that they should vote for you even though they didn't in the previous election.
one other key stat is missing from this list...
TRUMP was only the 3rd incumbent president in american history to increase their vote totals in each of the 50 states for their re-election.
the other two? Nixon and Reagan, who both won 49 state landslides.
That's a huge stat. It can't be too hard for incumbents to out perform themselves in say 25 states (assuming you didn't cause economic collapse or needless war), but increasing your vote totals in every state is exceptional. It shows that you had an incredibly popular message. Most importantly it shows that your performance in these four years convinced a diverse and expansive portion of the country that they should vote for you even though they didn't in the previous election.