I didn't even hear the 'over here' part. I just heard Biden say that Abraham Lincoln was the most racist president in American history and didn't realize he was referring to Trump until he started talking about illegal immigrants from Mexico. I wasn't even sure it was a gaffe up until then given that Biden had expressed in an interview that he didn't believe America has ever lived up to its ideals. It wouldn't be that much of a stretch for him to also believe that Lincoln was this great racist.