history and government (civics).
Take an oath of allegiance to the United States.
{https://www.uscis.gov/citizenship/learners/learn-about-naturalization}
You may be denied if you merited the green card in the first place ,, you did something to make you removable from the United States, or of you don't meet the basic eligibility criteria for U.S. citizenship.For the protection of the U.S., people with histories of criminal or terrorist activities, drug abuse, infectious medical problems, or certain other characteristics will never be allowed a visa, green card, or U.S. entry, unless special permission is granted. In immigration law terms, these characteristics are known as the grounds of inadmissibility .
Many people do not follow these steps and come illegally The United States’ borders are policed by the U.S. Customs and Border Protection (). The border patrol mainly guards against illegal immigration, smuggling of people, weapons and drugs, and insects or other pests that could damage agriculture. Illegal immigration is the act by foreign countries violating us immigration laws or entering the country without the us government permission. someone may come illegally because they don't reach the rules they need to come with