USCIS has been pressured in recent years to make its policies clearer and its practices more effective. Some immigrants wait months or even longer for immigration requests to be processed, and instructions and well as processed can be confusing. The USCIS has launched a USCIS Policy Review in 2010 in order to address these issues. [...]

Illegal immigration refers to any immigration practice which violates immigration rules. In most cases, however, when we speak of illegal immigration, we are talking about undocumented immigrants entering the country across the borders without going through the US immigration process. Due to the nature of illegal immigration, getting accurate figures about the phenomena is difficult. [...]