Meanwhile, the polls indicated that support for impeachment has shifted markedly, with most Americans now supporting it.
As the impeachment inquiry gathers pace, both sides seem to be digging in. What happens in the inquiry in the next few months will have a huge impact on the 2020 presidential election.
A quirk of mathematics gives voters in some small states, like Rhode Island and Nebraska, an extra edge over voters in other states. This happens not only in the US, but in other countries, too.
A little-known provision of the Constitution might allow Trump to be reelected president in 2020 even if he is removed from office through the impeachment process.
Americans want government to serve them, but don't have confidence that it actually can.
The Democratic candidates hoping to replace Trump in 2020 debated a host of critical issues but never brought up the equally important challenge of Americans' food security.
The Russians won’t be alone in spreading disinformation in 2020. Their most likely imitator will be Iran. Also, Instagram could get even more infected with intentional misinformation than it has been.
A recent survey in Indiana finds broad concern about climate change and support for addressing it in this red state, with one catch: Many Hoosiers don't realize their neighbors agree with them.
US President Donald Trump is in an unenviable position as the race towards the 2020 presidential election heats up. Meanwhile, the UK's attempts to Brexit continue to be untidy.
She's sitting third on the list of Democratic candidates at the moment, but the Massachusetts Senator's growing popularity may catapult her to the nomination.
TV has long been the golden goose of political advertising – the one who spends the most wins. That's over, and it's a new era of digital advertising. No one's done it better than Donald Trump.
Political campaigns and journalists often turn to social media to see how voters feel about an election. But the numbers they see there may not accurately reflect the electorate's views.
Understanding moderate politics can help us navigate the extremes of the current age.
Hillary Clinton arguably lost in 2020 because she took workers for granted. Will Democrats make the same mistake again?
The religious right may have dominated US politics for decades, but progressive Christians are growing louder in their faith-based opposition to the Trump administration's immigration policies.
Despite a drop in support after the first Democratic presidential debate, Joe Biden's perceived electiability is serving him well in the race to secure his party's nomination.
The 2020 US election could set a record for ugliness and division. Two previous elections provide important context for what that division can mean.
While other countries set strict limits on the length of campaigns, American presidential races have become drawn-out, yearslong affairs. It wasn’t always this way.
Facebook serves as a gatekeeper of the information diets of more than 200 million Americans and 2 billion users worldwide.
Joe Biden remains the favourite in the Democratic race - but there are question marks over whether he can beat Donald Trump.