I reckon she's thinking something along the lines of, if Trump gets more than !2% of the African American vote that (in conix's mind) would say that Trump had attracted more of them to the Republican party.
Guess, whatever the result is, one factor would be how many African Americans, do, or don't, realize that Trump, on their job figures, is little more than just a guy who gained much via the trends Obama gave him.
And on how many voters period understand that all Americans would be better off, in a stronger economy, if not for Trump's trade wars.