Oh god, don't give them any ideas. We already have an alphabet soup of intelligence agencies (the IC consists of 16 at the moment), don't make it worse.
I was suggesting that you reduce the number by merging all the policeing type orgs into one FBI, BATF, TSA,DEA etc and merge all of the domestic contra espionage into a new MI5 analog
1 A federal police force (with reduced surveillance powers) which would take over the BATF and the currency and uniformed part of the secret service.
2 A separate contra espionage organisation similar to MI5