When new American citizens are naturalized, they take the following oath:
I hereby declare, on oath, that I absolutely and entirely renounce and abjure all allegiance and fidelity to any foreign prince, potentate, state, or sovereignty, of whom or which I have heretofore been a subject or citizen; that I will support and defend the Constitution and laws of the United States of America against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same; that I will bear arms on behalf of the United States when required by the law; that I will perform noncombatant service in the Armed Forces of the United States when required by the law; that I will perform work of national importance under civilian direction when required by the law; and that I take this obligation freely, without any mental reservation or purpose of evasion; so help me God.
The first part of the oath strikes me as odd. Someone who becomes a citizen is not, in fact, required to renounce their prior citizenship–there are lots of dual nationals who are naturalized American citizens. The second part (about subjecting yourself to the draft or to a noncombatant role) is rather outdated. And nothing in the oath refers to the actual duties of citizens (serving on juries, paying taxes, etc.) Perhaps it’s time for a new oath.