I agree with David French here:
About that recent polling showing zealous Evangelical opposition to impeachment — The “lesser of two evils” mask is off. The alternative here isn’t Hillary but Pence.
Under similar facts for a Democrat, they’d want to remove.
These Evangelicals are just Trumpists now.
— David French (@DavidAFrench) October 21, 2019
I think French is referring to this recent PRRI survey.
Emma Green provides some context at The Atlantic.