Challenge: Somebody burns down the White House in 1999 or 2000

With a PoD in or after 1970, have the US get to the point where somebody, ANYBODY, with domestic or international origins, burns down the White House.

Some requirements:
- Cannot be an accident
- Cannot be caused by nuclear war
- Cannot be sanctioned by the US government (no controlled demolishens)
 
Best I can think of, to get the ball rolling, is an alt-9/11 that has a plane crash into the White House. Whether or not that would lead to it burning down completely, I don't know, but it's the best I can come up with off the top of my head.
 
Well, not as an intentional act, but any of the major or not so major renovations, especially after electricity was installed ; OOPS! Actually, even gas or the original fireplaces; could have happened at any time. Depending on when/where it started, there could be significant damage before it was noticed.
 
Some set of events 1960-80 1) derails the Christian Right/GOP linkage 2) prevents Dubya from being born again.

Dubya gets elected in 1996 as a moderate/pseudolibertarian type with a personal life like OTL Trump, elected as a fiscal conservative. His reelection party in 2000 gets out of hand, leading to the white house burning down.
 
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