For instance,deportation proceedings must observe procedural due process rights. The executive branch of the government has to enforce the legislation passed by Congress. For instance, when Congress decides which class of aliens will be denied admission, or deported, the executive will decide who fits within each class. For many, the immigration process begins in the over 200 U.S. consulates and embassies, which are part of the Department of State. To obtain a visa necessary for entry in the United States, many will first file an application at the U.S. consulate.
Consular officers make the decision to grant or to deny a visa.
Consular decisions to deny a visa application by an alien overseas are neither judicially nor administratively reviewable. The INS inspects aliens at the border, and handles visa petitions, adjustment of status from nonimmigrant to immigrant, citizenship and deportations. The President appoints the Commissioner. Four Associate Commissioners and the General Counsel assist the Commissioner. Each region has a Regional Commissioner.