. >> michelle sagar, here from the g.a.o. on the government accountability office. looking at the high risk list, you can find online, you can find it on c-span's website to if you want to look at some of those categories in the list. but if you want to call and ask your questions about what they've discovered, 202748 8000 for democrats. 20274 -- for republicans and independents, 202748 8002. and if you want to text us a question or comment, you can do that at 202748 8003. one of those other categories, it is getting a lot of discussion lately on capitol hill was tax law, and particularly the enforcement of tax law. what did the g.a.o. find? >> this is an area that was added to the original list in 1990 and it has remained on the list. it is important to point out that even for some of these areas that were charter members, if you will, there has been incredible progress in various ways over the ensue in decades. so there are really two areas that we are looking. at one of them is the tax gap, which is the difference between taxes owed and taxes paid, and trying to