They're likely referencing that 2/3rds of voters either explicitly voted for Trump (≈31.9%), or implicitly support the result of the election by having not vote

They're likely referencing that 2/3rds of voters either explicitly voted for Trump (≈31.9%), or implicitly support the result of the election by having not voted at all (≈35.9%). (https://en.wikipedia.org/wiki/2024_United_States_presidential_election https://en.wikipedia.org/wiki/2024_United_States_presidentia...)