There's a big historiographic argument that's going on right now in academia between the connection. There has been a lot of work on the influence of Robertson and others in the 70s and 80s where they co-opted the political leanings of white protestants using religious ideals (in some sense) as an attempt to change the civil religion of the US to revert away from feminism or really change in general. There is a powerful work by Du Mez, Jesus and John Wayne, that attempts to connect this movement with Trumpism and I think the book does a great job of that.
I fall in line with others that think that Trumpism incorporated the religious right as just a part of its overall message and he certainly needs that contingency, but that his tent is bigger than the one created by white evangelicals in the 70s & 80s as that population continues to wane.
Either way, today is a good day and Dr. James Dobson....you are on the clock.