.NO PRESIDENTIAL dispute has actually possessed as a lot influence on a political election as that between Joe Biden and Donald Trump on June 27th. Mr Biden's functionality was therefore dreadful that his very own party pushed him to leave. Since Kamala Harris, the vice-president, substituted him as the Democrats' candidate the ethnicity has tightened up. It is right now a toss-up, according to The Financial expert's model. On September 10th Ms Harris are going to face Mr Trump in a second governmental controversy. How much difference will this one create?