The strange thing is that over the last five years, Americans have moved in an economically conservative direction: they are more likely to favor smaller government, to oppose redistribution of income and to favor private charities over government to aid the poor. While none of these opinions are held by a majority of Americans, the trends would seem to favor the Tea Party. So why are its negatives so high? To find out, we need to examine what kinds of people actually support it.

Beginning in 2006 we interviewed a representative sample of 3,000 Americans as part of our continuing research into national political attitudes, and we returned to interview many of the same people again this summer. As a result, we can look at what people told us, long before there was a Tea Party, to predict who would become a Tea Party supporter five years later. We can also account for multiple influences simultaneously — isolating the impact of one factor while holding others constant.

Our analysis casts doubt on the Tea Party’s “origin story.” Early on, Tea Partiers were often described as nonpartisan political neophytes. Actually, the Tea Party’s supporters today were highly partisan Republicans long before the Tea Party was born, and were more likely than others to have contacted government officials. In fact, past Republican affiliation is the single strongest predictor of Tea Party support today.

What’s more, contrary to some accounts, the Tea Party is not a creature of the Great Recession. Many Americans have suffered in the last four years, but they are no more likely than anyone else to support the Tea Party. And while the public image of the Tea Party focuses on a desire to shrink government, concern over big government is hardly the only or even the most important predictor of Tea Party support among voters.

So what do Tea Partiers have in common? They are overwhelmingly white, but even compared to other white Republicans, they had a low regard for immigrants and blacks long before Barack Obama was president, and they still do.