Just goes to show that when it comes to lies both sides are adept. The AT-6 was NEVER considered a forerunner. It hadn't (and still has not) even reached a level where it could match capabilities the Super Tucano had proven years before. The Super Tucano was built ground up to be a light-attack COIN aircraft, while the AT-6 was being modified to try and be one. If one wants to make a case for the AT-6 one can go ahead and use the 'Made in America' - however an argument cannot be made based on capabilities.
You can’t even make that case. The T-6 Texan II is actually a Swiss design that would be built under license in the US by a half Canadian company.