Seriously... that’s his bloodline?
I see the Franklin genes..... but Grant? Churchill?
George H. W. Bush was an eighth cousin, once removed, of Winston Churchill. George W. Bush would therefore be either an eighth cousin twice removed or (less likely) a ninth cousin of Winston Churchill.
Gingrich's biological father's surname was McPherson. I don't know if he is related to the Civil War general by that name or to the Civil War historian McPherson.