The USA's Ryder Cup captain Steve Stricker feels it would be a crime to host the event without having fans in attendance at Whistling Straits.
Padraig Harrington's European team are set to defend their title against Stricker's side in September, likely behind closed doors if it goes ahead.
"This event is made by the fans," the American skipper told Golf Affect Radio when asked about the prospect of a Ryder Cup without supporters. "If it was without fans, it almost would be a yawner of an event.
"To cheat out the Wisconsin fans would be a crime. I hope when we do have it, it can be up to its full potential.
"So far, we're planning it as if it's a go, like we're going to have it but there's some obstacles that we're going to have to face. The confidence of the people and the corporate people. It's going to come down to probably the safety. And who knows, right?
"They're going to have to make a decision here, probably within the next two or three weeks. The build-up to put up all the stands and all the corporate tents, all that kind of stuff, has to happen in June.
"I think there's just so much going on and there's so much movement and fluidity that no one can really make an informed decision at this time."