Can a person who becomes US Citizen be deported for lying on their paperwork?

Yes, a person who becomes a U.S. citizen can be deported if it is discovered that they obtained their citizenship through fraud or misrepresentation on their application. The U.S. government can initiate proceedings to revoke citizenship if evidence shows that the individual lied or concealed material facts during the naturalization process. This is known as denaturalization, and it can lead to deportation if the individual is found to be removable for other reasons as well.