I'd like to know more about why "NSF has tried to get rid of AO for a long time now." Anybody knows something interesting and specific? What I was able to find

I'd like to know more about why "NSF has tried to get rid of AO for a long time now." Anybody knows something interesting and specific? What I was able to find was the Washington Post 2007 article, where it's mentioned that: "states with major observatories, such as New Mexico and West Virginia, have senators famous for their power over purse strings, some of whom are already gearing up to fight proposed cuts. By contrast, Puerto Rico, a commonwealth of the United States, has no senators. And its representative in the House" "does not have a vote." and "The cash crunch stems from a "senior review" completed last November at NSF." and ""The ambitions of the astronomy community for new things was far outstripping the capacity of the federal budget to cover them," said Wayne van Citters, NSF's astronomy division director, who organized the independent review" https://www.washingtonpost.com/wp-dyn/content/article/2007/09/08/AR2007090801654.html https://www.washingtonpost.com/wp-dyn/content/article/2007/0...