Talk to about any Democratic voter these days, and they're already nervous about 2024.

At some point the conversation usually turns to this: How can Donald Trump - a twice-impeached, four-times indicted former president who tried to overturn the 2020 election and is campaigning on retribution - be tied, or even leading, Joe Biden in the 2024 election?

A slew of recent head-to-head polls in a hypothetical Biden-Trump rematch show the incumbent struggling against his Republican predecessor 13 months away from the presidential election in November 2024. Despite his well-documented legal troubles and increasingly violent rhetoric, Trump - for now - appears to be running away with the Republican nomination. And he's running neck-and-neck with Biden.

Trump leads Biden by 1.1 percentage points nationally, 45.2%-44.1%, in Real Clear Politics' average of polls. Just as concerning for Biden are polls showing voters remain concerned about his job performance, handling of the economy, his age and even whether he should run again.