The heart of American Democracy is the principle that sovereignty resides in “We the People.” For more than 200 years immigrants seeking American citizenship have taken an oath renouncing prior allegiances and transferring sole political allegiance to the United States. In the political sense, naturalized immigrants have left a previous “people” and joined the “American people.” This is the main reason for America’s great immigration success. The concept of “dual allegiance,” where some Americans have political allegiance to both the U.S. and a foreign state, is inconsistent with the moral foundation of American democracy. Dual allegiance citizens belong to another “we the people” (in the civic, not ethnic sense). Dual allegiance citizens exist in a political space beyond the American constitutional community and as members of another “people,” (i.e., a foreign political community) they have different (and in some cases, competing and conflicting) responsibilities, rights, interests, and commitments. These foreign interests and commitments–of objective practical necessity, as well as moral obligation–dilute their commitment, attachment and allegiance to the United States.