Back in April, the Democrats officially chose Joe Biden to run for the American presidency next year, because he could beat Donald Trump. But that was then.Since then, Biden’s approval has begun to tank. And voters of all stripes have reportedly been clutching their foreheads in despair. These are the candidates? An 81-year-old, and a would-be criminal with a fondness for quoting Hitler?Bruce Wolpe, who served on the Democratic staff in the US Congress during President Barack Obama’s first term, has been analysing American presidential elections for decades.Today, Bruce, who’s also a senior fellow at The United States Studies Centre, joins me to discuss what history can tell us about who might win. Subscribe to The Age & SMH: https://subscribe.smh.com.au/See omnystudio.com/listener for privacy information.