Conversation so far:
How was Norquist involved with tax reform?
Norquist is best known for founding Americans for Tax Reform (ATR.
what did ATR do?
The primary policy goal of Americans for Tax Reform is to reduce government revenues as a percentage of the GDP.

Question: What else is significant about ATR?
Self-contained rewrite: Aside from being the primary goal  to reduce government revenues as a percentage of the GDP what else is significant about ATR?