“Analysis of the religious identities of the two political parties reveals an increasingly homogeneous Republican Party, comprised overwhelmingly of white Christians, even as the country continues to become more diverse,” Robert P. Jones, founder and CEO of PRRI, said in a statement. “In terms of racial and religious diversity, self-identified Democrats look like 30-year-old America, whereas Republicans look like 70-year-old America,” he added. Although the White Christian share of the population declined to 42% in 2018, the PRRI survey said the trend had slowed, with the White Christian headcount up to 44% by 2020. The group said increases in the number of White mainline Protestants and a stabilization of the White Catholic population account for the slight uptick.