.NO PRESIDENTIAL DEBATE has actually had as much influence on an election as that between Joe Biden as well as Donald Trump on June 27th. Mr Biden's performance was therefore disastrous that his own party pressed him to leave. Due To The Fact That Kamala Harris, the vice-president, replaced him as the Democrats' nominee the ethnicity has actually tightened up. It is actually now a toss-up, according to The Economist's style. On September 10th Microsoft Harris will encounter Mr Trump in a second presidential dispute. How much difference will this set help make?