If I conducted a poll of readers of this blog about their choice for the Democratic nominee in 2020, I suppose that Sanders and Warren would lead the pack, overwhelmingly.

But here is a different point of view.

The North America editor of the BBC has a warning for Americans.

Pay attention to what happened in the British elections, where Boris Johnson walloped the Labour Party.

If you want to beat Trump, he says, don’t look for someone who promises the moon.

Sanders and Warren are popular with the young, but not with older voters, he says.

Choose a centrist.