0 n. 9 (1972) ("It is gen- erally accepted, however, that the power of Con- gress is the same as regards both (foreign and inter- state commerce)."); Saikrishna Prakash, Our Three Commerce Clauses and the Presumption of In- trasentence Uniformity. 55 Ark. L.Rev. 1149, 1173 (2003) ("In practice, we have three differ