Interesting question. I'd say yes. A country's trade agreement would fall under foreign policy.
On an unrelated note, I really can't wait for ComicCon. Thinking of going for the VIP package, just because.
Trust me... there's no other way to do it... my Brother bought himself and me 2 VIP passes to last years ComicCon and it was the best thing ever... we got there and the lineup was HUUUUUUMONGOUS! we walked up and were like uh... is this the line? and then some lady at the Door was like Are you VIP? Right this way and we got to go in 1hr early and did not have to wait in line at all was an awesome experience.