You wanna go toe to toe about verbal gaffes? Really? How about physical gaffes? Biden routinely gets taken out by stairs and sand bags.
You are not a serious person.
Biden has a documented stutter and verbal gaffs are a symptom of this.
That said, its another false equivalency when you look at how much worse Trump was, with that person camera woman thing, covfefe, big water, and etc. Like, he's objectively way worse when it comes do this and he doesn't have a stutter:
https://www.youtube.com/results?search_query=trump+gaffs