Is There Anything That Can Prevent Me from Getting a U.S. Green Card?

Question:

I will soon marry a US citizen and I hope to get US Green Card thereafter. Is there anything that can prevent me from getting a U.S. Green Card?

Answer:

It is important to understand that even though you have married a U.S. citizen, you have to meet certain criteria on your own before you can be granted a U.S. green card. This includes that you are not found “inadmissible.” Intending immigrants can be found inadmissible for any of the reasons described in the Immigration and Nationality Act.

Some of the grounds of inadmissibility that most often cause trouble are those barring entry to people who have committed certain types of crimes, developed certain physical or mental illnesses, broken U.S. immigration laws, or appear likely to become a public charge - receive public assistance due to financial need.