Expert comment: Joe Biden formally nominated at US Democratic Convention

Dr Trevor McCrisken, expert in US politics at the University of Warwick (UK), comments:

The Democratic Party brought out its heavy hitters to formally nominate its presidential candidate Joe Biden last night, with two former US Presidents, Jimmy Carter and Bill Clinton. The Virtual Convention may not have all the excitement and hoopla of the usual pre-election showcase, but the Party is doing its best to unite progressives and moderates in the party behind the Biden-Harris ticket. What's more they're reaching out to disgruntled Republicans with endorsements for Biden from key figures including none other than former Secretary of State Colin Powell, who has served in three Republican presidencies.