One can only speculate what country he would choose with the hot form he's in. Any position in the AW would be his for the taking but for USA he would be competing in a greater talent pool and the player competing for his current position would be Borrusia Dortmund player Christian Pulisic. The USMNT have alot of young players scattered in Europe and in the MLS but I could see Boyd being a really influential player with the young talent in that team.
Yeah, people keep saying "he'll get nowhere near the USMNT" but reality is, bar Pulisic he's one of the best 'American' attackers outside the MLS when you look at ability, form and league