Not many, it was solid "Red White and Blue" in the crowd....That's why they schedule the game there.
A small handful were sporting the “El Tri” colors.
Someone on another forum asked the question why didn’t they schedule the game at a NFL stadium (for a bigger crowd) instead of the smaller Columbus Crew stadium. The short answer was that the USSF wanted to ensure a “home crowd” for the US soccer team and not turn it into an away game for the USA in the USA.