Domenico Montanaro

Minutes away from the start of the Iowa caucuses, NPR's political team is the Midwestern state with the candidates — and also in the studio awaiting results.

The stakes are high in Iowa — the last four Democratic nominees have all won the Hawkeye state. The pressure is on Vermont Sen. Bernie Sanders who has led in the polls coming into the caucuses.

Vermont Sen. Bernie Sanders is the favorite heading into the caucuses, but polls have shown a tightly jumbled race at the top. Here are key questions and answers about Monday night.

A poll of Iowa Democrats will not be released this year ahead of the caucuses after complaints that Pete Buttigieg was left off it. We find out why this poll matters.

The Iowa caucuses are two days away. For the first time this election cycle, voters will get a say in who becomes the Democratic nominee for President.

How much progress has been made on the goals that President Trump laid out in his last State of the Union address?

Iowa has only 1% of the delegates up for grabs for the Democratic nomination, and yet the candidates have spent $50 million there on ads for a reason.

By a 49%-42% margin, Americans disapprove of how President Trump has handled the crisis with Iran, reflecting the number of people who disapprove of the job he's doing overall.

The candidates clashed over war, gender and health care with less than three weeks to go before the first votes in the Democratic presidential nominating fight.

Most Democratic voters say they could change their minds about whom they support. So be prepared for surprises as voting begins in the Democratic nominating contests next month.

The 2020 campaign is about to kick into high gear. Candidates are dropping out and others are announcing fundraising numbers. Meanwhile, voters will start voting in Iowa and New Hampshire in a month.

A tumultuous decade in politics saw everything from the presidency and reelection of the first black president to the rise of the Tea Party and the improbable election of Donald Trump as president.

NPR's top political stories of the year ranged from how incoming Speaker Nancy Pelosi would run the House to Robert Mueller's Russia report and the Green New Deal.

Former Vice President Joe Biden was steadier than in past debates; South Bend, Ind., Mayor Pete Buttigieg came under attack; and the candidates defended their least diverse debate stage yet.

The inception of partisanship goes back decades — and, guess what, Republicans and Democrats can't agree on who started it.

Despite weeks of public hearings, views on impeachment haven't budged, according to the latest NPR/PBS NewsHour/Marist Poll. "It's like the hearings have never happened," pollster Lee Miringoff said.

A new NPR/PBS NewsHour/Marist poll finds: American views of impeachment are divided and unchanged. Also, ex-Vice President Joe Biden and Sen. Bernie Sanders lead the Democratic presidential contest.

Democrats and Democratic-leaning independents say they prefer former Vice President Joe Biden and Vermont Sen. Bernie Sanders over the rest of the Democratic field just ahead of Sen. Elizabeth Warren.

President Trump and Republican supporters have dismissed the articles of impeachment brought before the president, but how do their arguments stack up?

Chairman Jerry Nadler unexpectedly called a halt for the night without consulting minority Republicans after hours of procedural combat toward the expected votes. GOP members were outraged.