Domestic wine only
We had no idea that the staff at the White House loved their wine this much and wanted to preserve its integrity. If you are the President you can basically get anything you want to be ordered to your place, except for wine that is not from the United States of America, which would be bad.
President Ford was the one who banned all foreign wine at the White House and wanted to keep just the domestic product going. We guess that he wanted to promote the country’s wineries and nothing else, we can’t say anything bad about that. If the President doesn’t drink his country’s own wine, who will?