text: Paul believes illegal aliens take a toll on welfare and Social Security and would end such benefits, concerned that uncontrolled immigration makes the U.S. a magnet for illegal aliens, increases welfare payments, and exacerbates the strain on an already highly unbalanced federal budget.
  Paul believes that illegal immigrants should not be given an "unfair advantage" under law. He has advocated for a "coherent immigration policy", and has spoken strongly against amnesty for illegal aliens because he believes it undermines the rule of law, grants pardons to lawbreakers, and subsidizes more illegal immigration. Paul voted for the Secure Fence Act of 2006, authorizing an additional 700 miles (1100 kilometers) of double-layered fencing between the U.S. and Mexico mainly because he wanted enforcement of the law and opposed amnesty, not because he supported the construction of a border fence.
  Paul believes that mandated hospital emergency treatment for illegal aliens should be ceased and that assistance from charities should instead be sought because there should be no federal mandates on providing health care for illegal aliens.
  Paul also believes children born in the U.S. to illegal aliens should not be granted automatic birthright citizenship. He has called for a new Constitutional amendment to revise Fourteenth Amendment principles and "end automatic birthright citizenship", and believes that welfare issues are directly tied to the illegal immigration problem.
  Terrorism
  Letters of marque and reprisal