"Abraham Lincoln *here, is the most racist president we ever had." The *here that he mentioned changes the specifics of the subject. Since Abe is obv. dead, he's not referring to a ghost. Since the issue of Don's racism is in contention at the time of the discussion, it's clear he's sarcastically referring to the Dump as he constantly compares himself to Abe saying he's done the most for blacks... Without considering other Presidents like... Oh I donno... Johnson.
