To give you a data point, current shutdown that just ended was a fight about 5 billions. Budget is big - even discretionary one - which is only one that needs to be considered when we talk about spending priorities, since non-discretionary one is pretty much fixed - but it also has a lot of items inside. And if we talk about priorities for specific items, 100bn is nothing to sneeze at. Whole Department of Energy budget is is about 30bn - so it's definitely on the same scale.