But despite the decisions that the Obama administration made that might have helped Elkhart, many people here have a strong dislike of Obama, who presided over an economic recovery in which the unemployment rate fell nationally to 4.6 percent from a high of 10 percent in October 2009. They say it’s not Obama who is responsible for the city or the country’s economic progress, and furthermore, that the economy won’t truly start to improve until President-elect Donald Trump takes office.

“He didn’t help us here, but he took credit for what happened,” Chris Corbin, 47, who works for a dispatch company in Elkhart, told me. Corbin thinks it will be Trump who improves the economy. “It’s going to take two terms, but he’ll fix things,” he said.

Elkhart is a case study in how Democrats lost the 2016 elections despite the economic resurgence the country experienced under Obama. It shows how, in an increasingly polarized country, an improving economy is not enough to get Republicans to vote for Democrats, in part because they don’t give Democrats any credit for fixing the economy. Gallup, for instance, found that while just 16 percent of Republicans said they thought the economy was getting better in the week leading up to the election, 49 percent said they thought it was getting better in the week after the election. And in a Pew poll in 2015, one in three Republicans said the economy wasn’t recovering at all, while just 7 percent of Democrats said that. This bias is true for Democrats, too, of course. Before the election, according to the Gallup poll, 35 percent thought the economy was getting worse, while after the election, 47 percent of Democrats thought that.

These biases are only increasing as the country becomes increasingly polarized. As people become increasingly loyal to their parties, they are unlikely to give leaders from the other party credit for much of anything positive. Both sides are instead more likely to believe narratives that suggest that the other party has only made things worse.

“People’s predispositions affect their factual beliefs about the world,” said Brendan Nyhan, a professor of government at Dartmouth College who has researched why people believe what they do about politics. “What we want to be true influences what we believe to be true.”

Indeed, as the economy began improving, Elkhart voters grew less likely to support Democratic candidates for president. Obama won 44 percent of the vote in Elkhart County in 2008, 36 percent in 2012, and Clinton received just 31 percent in 2016.

Of course, there are many reasons why people in Elkhart might dislike Obama that have nothing to do with his role in the economy. Ed Neufeldt, whose daughter and two son-in-laws now work in the RV industry after losing their jobs in it during the recession, told me he thought Obama was responsible for improving the economy in Elkhart, but that he still didn’t like the president because of his stance on abortion.