“Democrats always start general elections for POTUS ahead; if Trump is essentially within the margin of error, then unless he does something really stupid (like throw the second and third debates, and yes, Mitt, I mean you), he’s in like Flynn as the Afterbama.”
The saying is ‘In Like Flint’ :)
https://en.wikipedia.org/wiki/In_Like_Flint
From your link:
The title is a play on the phrase “in like Flynn.”
Flynn.