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Although Mexican nationals make up the majority of recent illegal aliens, a great number of illegal aliens are also Canadian, Australian, or British Citizens.

Although Mexican nationals make up the majority of recent illegal aliens, a great number of illegal aliens are also Canadian, Australian, or British Citizens.

Some have cited a population in excess of 12 million foreigners without legal status in the United States (although this figure is debateable).  

Some have cited a population in excess of 12 million foreigners without legal status in the United States (although this figure is debatable).  

In the United States, it is illegal and punishable by the law to hire a worker without legal work authorization. Employers who break this law can face stiff fines and /or imprisonment although most conservatives would argue that the law is very infrequently enforced.

In the United States, it is illegal and punishable by the law to hire a worker without legal work authorization. Employers who break this law can face stiff fines and /or imprisonment although most conservatives would argue that the law is very infrequently enforced.