No it will not be affected. You can be a dual citizen of Ireland and the United States.
The answer provided here is general in nature and does not take into account other factors that may need to be reviewed for a more precise answer. You should consult with an immigration attorney before taking any action. The answer here is not intended to create an attorney-client relationship.
Hi there. I am not an expert in Irish immigration law but I found a website for U.S. citizens interested in applying for Irish citizenship that you may find helpful: http://www.aohnewport.org/citizenship.htm. You could also contact the nearest Irish consulate (I'm guessing for you that would be in Chicago - a list of Irish consulates in the US is at the bottom of the link I provided), an Irish immigration attorney and/or a US immigration attorney with special knowledge of Irish immigration laws (via avvo or AILA search). Good luck!
This advice does not form an attorney-client relationship and is merely informative. It should not by itself be relied upon to address a legal concern.
No, the position of the U.S. Government is as follows: it does not encourage any U.S. Citizen to assume a citizenship of another country, yet, it DOES NOT PROHIBIT such USC from having a dual citizenship elsewhere. Proceed as planned.
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