Yes, but you would need a visa or have citizenship from a VWP participant country.
Mark Zuckerberg did not renounce his US citizenship. He did, however, give up his US citizenship while acquiring citizenship in other countries to avoid double taxation on his assets.
No, once you renounce your US citizenship, you are no longer eligible to apply for a green card.
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US citizenship can only be renounced in writing at a US embassy (i.e. outside the U.S.). Be sure you have citizenship in another country before doing this.
Spain has dual citizenship agreement ONLY with Spanish countries of South America, Portugal and Philippines. Other countries have to renounce their citizenship if they can and then become a Spanish citizen- in your case the US allows you to renounce: so you must.
Yes, it is possible to lose your US citizenship if you voluntarily renounce it, commit certain acts of treason or fraud, or obtain citizenship in another country with the intention of relinquishing your US citizenship.
Only if the other country does not ask you to renounce your US citizenship (e.g. Norway, Denmark, Spain and Luxembourg require you to renounce your US citizenship if you want to obtain their citizenship).
Not unless you renounce your Canadian citizenship voluntarily.
You have to be outside of the US to renounce your citizenship, so the question of deportation wouldn't arise in the first place.
If you renounce American citizenship by giving notice to the U.S. State Department, you probably cannot be deported back to the U.S. However, renouncing your citizenship without securing a new citizenship is probably not the smartest choice. And it won't help Iraqis much, either.
You never lose US citizenship unless you either renounce it voluntarily or by serving in the army of a country that is in war with the US.
No, you do not have to renounce Canadian citizenship to become a U.S. citizen. Canada allows dual citizenship, meaning you can hold citizenship in both countries simultaneously. However, when applying for U.S. citizenship, you must comply with U.S. laws and requirements, but renouncing Canadian citizenship is not a condition. Always check for any changes in immigration policies that may affect this status.