.NO PRESIDENTIAL controversy has had as much effect on an election as that between Joe Biden and also Donald Trump on June 27th. Mr Biden's efficiency was actually so devastating that his personal celebration pressed him to quit. Since Kamala Harris, the vice-president, changed him as the Democrats' nominee the ethnicity has secured. It is right now a toss-up, according to The Economist's version. On September 10th Ms Harris will certainly experience Mr Trump in a second presidential discussion. Just how much distinction will this create?