There's also a good possibility the IRS notice is wrong, but the administration will just run him in circles, especially since he's White.

The IRS is packed with sheboons who hate Whitey. I've dealt with them in person at your local office. You don't get to the White guys until you're in court and dealing directly with a treasury attorney. Those guys can be tough, but they don't fuck around if they're clearly wrong.

One time I stiffed a sheboon who excessively subpoenaed my client in violation of statute by not appearing. She threated to have my client arrested. I told her to fuck off. Revenue attorney calls me... "Why aren't you responding?" I told him why, and he just said "oh... OK. Just disregard the subpoena."