This is based on 43 states being considered “non-negotiable” and “set in stone” while only 7 are considered “swing” states
Also consider I specified “voters”, who are at best only 2/3 of the total population, which leaves out about 100 million extra people
It’s really more about the people who will either vote for you or not vote and getting them to actually vote. “Swing voters” are like 6 guys, 5 of who are in solidly red states where it won’t matter anyway.