I am having a discussion about background checks with my brother. He is for them, I am against. He wants background checks to keep illegal immigrants and terrorists from getting guns.

I have a response put together but want to make sure I hit all the bases. What federal laws are there that already exist that make it illegal for illegal immigrants and terrorist to buy guns? (I’ve already pointed out that immigration laws have not kept illegal immigrant from entering the country legally just like background checks would not keep criminals from getting guns if they really want them)

Thanks in advance.


Edit to add..... He is not an anti and generally very strong on gun rights.