How will an application for dual citizenship under R.A. 9225 affect a U.S. citizenship?
The Philippines Consulate General in Los Angeles advises that Prospective applicants for dual citizenship under R.A. 9225 are advised to visit and read the contents of www.travel.state.gov/…/citizenship_778.html, the website of the U.S. Department of State which contains information about current U.S. government policy on dual nationality, or to seek legal advice from a U.S. immigration lawyer.
A natural born Filipino CAN hold Dual Citizenship with other countries, as far as the Philippine Law is concerned.
Can a US Citizen who renounces US Citizenship to become another nationality be considered a US Citizen ?
There is at leasat one case where a US Citizen had renounced US Citizenship when taking another Nationality, but was still treated as a US Citizen by US Authorities.
This appears to say that US Citizenship is not lost even after renouncing it.
Kawakita v. United States, 1952, 343 U.S. 717