Let’s put it into math instead:

Let S₁ be the set of people who voted for Biden. Let S₂ be the set of people who voted for Trump’s second term.

S₁ ∩ S₂ ≠ {}

If that’s not helpful, let’s try code:

s1 = getPeopleWhoVotedForBiden()
s2 = getPeopleWhoVotedForTrumpsSecondTerm()

if (x for x in s1 if x in s2 > 0):
  print("There are more than enough people qualifying for for what I said")

And lastly, to reformulate the sentence:

There are lots of people who in 2020 voted for Biden and in 2024 voted for Trump.