Joe Biden’s low-key campaign questioned by Donald Trump and some Democrats

Democratic presidential candidate former vice-president Joe Biden speaks during an economic summit in North Carolina (Carolyn Kaster/AP)

The final stretch of a US presidential campaign is typically a non-stop mix of travel, caffeine and adrenaline – but Joe Biden is taking a lower key approach.

Since his selection of California senator Kamala Harris as his running mate on August 11, Mr Biden has had 22 days when he either did not make public appearances, held only virtual fundraisers or ventured from his Delaware home solely for church.