You may address agencies that collect overseas and within the homeland as the terrorism nexus overlaps both domains. You may also consider some of the field agencies of DHS as some of the operating components do collect like ICE, CBP, USCG, and the Secret Service .
Which members of the IC would be the best collectors of intelligence on this particular organization within the country?
Again, this is a Homeland Security course, so focus on the agencies that can support the homeland , NOT primarily overseas intelligence collection of foreign targets. Clearly focus your paper only on domestic intelligence and law enforcement and remember the CIA does not collect intelligence on Americans domestically, they are a foreign intelligence agency .
See the readings from week 5 as well as this link to Executive Order 12333 https://fas.org/irp/offdocs/eo/eo-12333-2008.pdf. However, the NSA is very different as they can and do collect both foreign and domestic communications . See https://www.nsa.gov/about/faqs/sigint-faqs.shtml
