A good long piece analyzing the findings of the Pew Research 2014 Religious Landscape Study, mainly from a political perspective.

The above chart contrasts religious minorities in Canada with those in the USA. The more significant difference is with respect to Christians: some 60 percent of Canadian Christians are Catholic compared to 30 percent of Christians in the USA. Evangelicals form 35 percent of US Christians compared to about five percent in Canada (counting Baptist and Pentecostal as such). This helps explain, in part, the vast difference in political culture between the two countries, given the importance of the evangelical base to the US Republicans.

While the warning to the Democrats that the culturally liberal attitudes of their white upper class elites may create tension with their more traditional Black and Hispanic constituencies, it is unclear whether the ‘culture wars’ play that significant a role compared to more bread-and-butter issues for minorities (in contrast to the Republicans):

Long the dom­in­ant group in Amer­ic­an re­li­gious life, White Chris­ti­ans have fallen be­low a ma­jor­ity of the U.S. pop­u­la­tion—and they are mov­ing to the right polit­ic­ally as they re­cede.

The res­ult is that, like race and age, re­li­gious affiliation marks a sharpen­ing point of dis­tinc­tion between Re­pub­lic­ans and Demo­crats, pre­vi­ously un­pub­lished res­ults from the Pew Re­search Cen­ter’s massive Re­li­gious Land­scape sur­vey show.

As the na­tion re­lent­lessly di­ver­si­fies, both in its radical com­pos­i­tion and re­li­gious pref­er­ences, White Chris­ti­ans now rep­res­ent just 46 per­cent of Amer­ic­an adults, ac­cord­ing to Pew data provided in re­sponse to a re­quest from Next Amer­ica. That’s down from a 55 per­cent ma­jor­ity as re­cently as 2007, and much high­er figures through most of U.S. his­tory.

Yet even as White Chris­ti­ans shrink in their over­all num­bers, they still ac­count for nearly sev­en-in-10 Amer­ic­ans who identi­fy with, or lean to­ward, the Re­pub­lic­an Party, the Pew study found. White Chris­ti­ans, in fact, rep­res­ent as large a share of the Re­pub­lic­an co­ali­tion today as they did of Amer­ic­an so­ci­ety over­all in 1984, when Ron­ald Re­agan won reelec­tion. A clear ma­jor­ity of all White Christians across the United States now identi­fy as Re­pub­lic­an, Pew found.

In sharp con­trast, the Pew data show, the Demo­crat­ic co­ali­tion has evolved in­to a three-legged stool that di­vides al­most evenly between White Chris­ti­ans, non-White Chris­ti­ans, and those from all races who identi­fy either with a non-Chris­ti­an faith or, in­creas­ingly, with no re­li­gious tra­di­tion at all. Most Amer­ic­ans who don’t identi­fy with any re­li­gious faith—a rap­idly grow­ing group—now align with Demo­crats.

These di­ver­ging pro­files create elect­or­al chal­lenges for each side. Re­pub­lic­ans face the ten­sion of bal­an­cing the mor­ally con­ser­vat­ive pref­er­ences of their re­li­giously de­vout base with the deep­en­ing in­stinct to­ward cul­tur­al tol­er­ance of a so­ci­ety that is grow­ing more sec­u­lar, par­tic­u­larly among the young.

Demo­crats must weigh the cul­tur­ally lib­er­al in­stincts of their now mostly sec­u­lar wing of up­scale Whites with the of­ten more tradition­al in­clin­a­tions of their Afric­an-Amer­ic­an and Latino sup­port­ers, who are much more likely than White Demo­crats to identi­fy with Chris­ti­an faiths. In a land­mark shift, few­er than half of White Demo­crats with a col­lege de­gree now identi­fy as Chris­ti­ans; that’s a much smal­ler per­cent­age than among the party’s Blacks and Lati­nos.

Above all, the end of ma­jor­ity status for White Chris­ti­ans marks an­oth­er mile­stone in Amer­ica’s trans­form­a­tion in­to a kal­eido­scope so­ci­ety with no single dom­in­ant group.