......20 is wishful thinking because it's vastly different from historical trends.......
The depends on what you mean by historic. There was a time when ALL blacks voted Republican. Fifteen black men founded the Republican Party of Texas. How many people here know that.
Right now, blacks are slowly but surely moving towards Trump.
20% is a goal. Sure, we might not get there this election, but when we do it will be awesome.
As for "wishful thinking," I remember every media expert saying it was impossible for Trump to ever be president.