Immigration has been one of the major sources of the US population. The US lets more legal immigrants as residents than all other countries combined. Immigration causes many problems. The economic and political aspects have caused many controversy with ethnicity, benefits, and job loss to non-immigrates. People debate if immigration is good for the US because all these controversies. Most of the immigration comes from Mexico and most of them are illegally entering the US. Lately the Obama's  administration said that they are only deporting that committed a crime. It has caused so much controversy lately.