Watch the CBSN Originals documentary "The Right's Fight to Make America a Christian Nation" in the video player above. It premieres on CBSN Sunday, March 7, at 8 p.m., 11 p.m. and 2 a.m. ET.

Outside the Capitol insurrection in January, a group of protesters carried a large wooden cross and a flag flew reading "Jesus is My Savior, Trump is My President."

Some in the crowd embraced Christian nationalism, an ideology that combines Christian and American identities and promotes Christianity as the reigning religion. Research has found that adherence to Christian nationalism was a significant predictor of support for Donald Trump in the 2016 election.

Like other White evangelical Christians — a reliable Republican voting bloc for decades — they saw their support for President Trump rewarded with conservative judicial nominees and policies promoting "religious liberty." But hundreds of evangelical leaders have condemned the "radicalization" emerging among those who identify as Christian nationalists.

The debate over what role religion should play in public life has never been more contentious, with some promoting a vision of Christian primacy that critics say tramples on the rights of everyone else.

Several pastors with very different points of view shared their thoughts in the new CBSN Originals documentary, "The Right's Fight to Make America a Christian Nation."