Don’t know about Mexico, but I think F1 interest in the US is growing considerably. I saw it trending upward the last two years they were in Indy, and Austin seems to do even better.
I don’t think it will hurt any more than having run the US GP at Indy one or two weeks after Montreal. The US GP will continue to do well.
growing yes, but i do agree having two races back to back that close together will siphon off ticket sales from both tracks instead of having one race a week before or a week after Canada with the other in november would help both races