Maybe so, but it would've been better not to have scheduled to begin with; both the USAC and Bloomington dates have been in the books for some time, as far as I can tell.
As for me, I can't think of anything more American than being at a racetrack on the 4th of July; would've been cool to have experienced it as a participant rather than a spectator.
What I'm getting at is I'm more disappointed than I am trying to be critical...