One of my responses after the election of Trump was that his election signified the loss of influence of the Christian church, particularly if someone so immoral and whose views were antithetical to the faith could get elected, then we had lost our influence even more than we realized.
In the most recent Atlantic, an article by Peter Beinart gives support to that thesis, while also showing wider cultural trends.
Whereas it has long been claimed that a more secular society will be more tolerant and liberal and will avoid the culture wars, that does not seem to be true. People who aren't active in church are more likely to hold extreme, polarizing political views. Beinart writes, "As Americans have left organized religion, they haven’t stopped viewing politics as a struggle between “us” and “them.” Many have come to define us and them in even more primal and irreconcilable ways."
He discusses how non-church going religious conservatives were the core of Trump's supporters, that non-church going liberals split with church-going liberals over Hillary and Bernie, and that Black Lives Matter doesn't work within the traditional church as previous civil rights movements have. Beinart concludes:
Maybe it’s the values of hierarchy, authority, and tradition that churches instill. Maybe religion builds habits and networks that help people better weather national traumas, and thus retain their faith that the system works. For whatever reason, secularization isn’t easing political conflict. It’s making American politics even more convulsive and zero-sum.