The competing paths to the 2020 Democratic presidential nomination, explained

How is anybody except Joe Biden planning to actually win the 2020 Democratic nomination?

There are 24 theories for winning the 2020 Democratic presidential primary.

It’s about building electoral momentum, and, more than anything else, it’s about winning Democratic National Convention delegates. The primary follows a very deliberate calendar, starting in Iowa and then heading to New Hampshire, building through Nevada and South Carolina all the way to the Super Tuesday bonanza, with California and Texas as the biggest prizes.

There are reams of delegate rules to learn and consider,...