we ain't seen nothin yet if that comes to pass.
Actual Christians will not find it makes a difference to their allegiances to the Lord whether or not the present regime is friendly to them (although of course as the bible reminds us, we ought to be praying that it will be friendly to things godly).
Christians are still aliens and strangers; earthly friends today may prove to be fiends tomorrow, or vice versa. And God has no grandchildren. A righteous (by faith), virtuous generation may be followed by a wicked one, occupying the very same place.
We should be ready to follow up with God in either the case of a more friendly or a more hostile America.