One danger facing religion-beat veterans is that a broad trend becomes so familiar we overlook its continuing journalistic importance. One example is the year-by-year-by-year decline of America's once-influential "Mainline" Protestant churches over the past half-century, even as conservative or "Evangelical" Protestants generally kept up with population growth -- until recently.
(For additional background, please note that the June 24 Guy Memo lamented media neglect of Mainline angles in spot news coverage. See also this recent Ryan Burge post.)
The Mainline shrinkage is one of this era's momentous changes in American religion, a great void in the public square into which evangelicals moved. Other major trends include the substantial rise of unaffiliated "nones," immigration-driven increases in Hispanic Catholics and followers of Asian religions, and white Catholics' shift from loyal Democrats to pivotal Republican constituency.
It's big stuff if that Mainline Protestant slide has bottomed out or that’s any kind of upswing. And what if Mainliners now suddenly outnumber the rival white Evangelicals (leaving aside the distinctive Black and Hispanic Evangelicals). Such is the scenario in a major new survey released July 8 by the Public Religion Research Institute (contacts at press@prri.org or 202-238-9424).
PRRI tells us that white Mainliners are now 16.4% of the U.S. population, a remarkable gain from 13% as recently as 2016, while white Evangelicals have fallen to 14.5% from a 23% peak in 2006. White Catholics constitute a pretty stable 11.7%.
Politically, Mainliners are divided and thus have less clout than other groups, identifying as 35% Democrats, 33% Republicans, and 30% Independents.
As journalists ponder what to make of this surprising report, begin with what's “Mainline” in the church marketplace. The Guy (and others) say the word designates those Protestant denominations — the so-called “Seven Sisters” — born in Colonial America or the early Republic, with predominantly white memberships, that are affiliated with the National Council of Churches and are tolerant or favorable toward liberal belief. We could add that the well-educated Mainliners typically enjoy relatively high incomes and social status.
Here is the key: This PRRI survey at hand identified Mainliners by what they are not instead of what they are.









