I was talking about voters, not Twitter followers....
Well don't besmirch Americans by saying "half the nation" if you're only talking about GOP voters. More voters didn't vote at all than vote for either of the two evils. There are a lot of Americans who didn't vote because they couldn't register, couldn't get to the polling location when it was open, votes got thrown out, etc. etc. (voter suppression)
331million U.S. population
231million U.S. eligible voters
168million registered to vote
154million voted in November 2020
74 million GOP voters (
https://uselectionatlas.org/RESULTS/national.php)
Trump's account had 32million followers
%?? U.S. humans who voted GOP in November 2020
%?? U.S. humans who voted DNC+other in November 2020
%?? U.S. humans who didn't vote
%?? non-U.S. humans
%?? twitter software bot accounts
I invite you to fill in those question marks, but it all adds up to (32/74) 43% of the total number of GOP voters.
I think Trump got extra reach via ratings-driven cable TV and other media coverage of his tweets. Looks like "half the nation" is rather generous phrasing, since he got voted out after one term.
I really do think that the "spectre of Trump coming back to Twitter" is overblown. Even if he does start tweeting, I don't believe it will have the same traction it used to.