Dear Mr. Tagliarino,
Thank you for posting your request on History Hub!
Since the U.S. Census notes citizenship status, we searched the National Archives Catalog and located the Population Schedules for the 1910 Census, the Population Schedules for the 1920 Census, the Population Schedules for the 1930 Census, and the Population Schedules for the 1940 Census in the Records of the Bureau of the Census (Record Group 29) that may indicate his citizenship status. The 1940 Census schedules are digitized and available using the Catalog. For access to the non-digitized schedules, please contact the National Archives at Washington, DC - Textual Reference (RDT1) via email at firstname.lastname@example.org.
For information about the U.S. Census, see the Census Bureau technical documentation and questionnaires. Please review the FamilySearch wiki for Naturalization Terms and Acronyms and NARA’s Naturalization Records website for an overview of the naturalization process.
If Charlie Tagliarino was listed as a citizen in a U.S. Census, the naturalization would have taken place in a Federal court. If the petition was filed in a Federal court in Louisiana, the National Archives at Fort Worth (RM-FW) should have a copy of both his declaration and petition within their holdings, We suggest you contact RM-FW via email at email@example.com to request a copy of these records. To ensure a successful request, please include the name of petitioner (including known variants); date of birth; approximate date of entry to the US; approximate date of naturalization; where the individual was residing at the time of naturalization (city/county/state); and country of origin.
Due to the COVID-19 pandemic and pursuant to guidance received from the Office of Management and Budget (OMB), NARA has adjusted its normal operations to balance the need of completing its mission-critical work while also adhering to the recommended social distancing for the safety of NARA staff. As a result of this re-prioritization of activities, you may experience a delay in receiving an initial acknowledgement as well as a substantive response to your reference request from RM-FW. We apologize for this inconvenience and appreciate your understanding and patience.
If you find no citizenship status listed for Charlie Tagliarino in the U.S. Censuses, we suggest that you request a certification of non-existence of a record of naturalization from USCIS (Genealogy Frequently Asked Questions - see About Further Research section), as well as submit an Index Search request to the USCIS Genealogy Program. USCIS should be able to provide the certification on non-existence, and although your grandfather won’t have a naturalization record, it is likely that INS did create an A-File that could be used to verify his citizenship status.
We hope this is helpful. Best of luck with your research!