As we looked at similarities and differences of views among Democratic supporters of six candidates seeking the presidential nomination for president, we found an impressive amount of consensus, regardless of whom they support.

In addition to asking people whether they agree with policy outcomes, all of them also answered a series of questions that allowed us to measure the importance they attach to each issue. Here’s how that worked: Each person saw two randomly selected collections of up to four policy positions, and we asked them to choose which collection of outcomes they preferred. All of them did this 10 times and, in the course of doing so, revealed which positions they prioritized and which ones were relatively less important.

We compared the outcomes across supporters of the four Iowa front-runners, as well as Amy Klobuchar (although we had less data on her supporters). Despite differences in the demographics of people who support them and their ideological labels, there were few differences in the beliefs and priorities of the candidates’ supporters.

All of the candidates’ supporters wanted to impeach Mr. Trump and placed that issue in the top five priorities among the 41 things we asked about. (We wrote about the prominence of this previously.) But it is not the only thing Democratic voters agree on.