What was role of fundamentalist christians in Reagan election in 1980

Context: claim in [@curtis-2004-power-of-nightmares, part 1 49:48] that they were.

Where could i get data to check this claim?

cf [@hughes-2004?-american-fascists] provides a lot of history of development of a politically aggressive (fascist) christian right since 1970s ("dominionists" he terms them as they seek dominion over the state and of america over the world)