First of all, who is "they"?
Second, how can Trump be pulled down by Biden when Trump's not even in office?
Finally, yeah, whatever, I guess that comparisons of Biden to Trump could pull Biden down, but Trump's records, words, and actions are uplifting, supportive, and positive, not a weight to pull anyone down. It's not Trump's fault that Biden will never be anything other than the worst resident of the White House in history.
Not trying to be picky, this is just a strange analogy.