Donald Trump, an American reality-television celebrity and busi­ness mogul, is at this writing a front-running Republican in the bid for the US presidency. His opening salvo as a candidate included charges that Mexican immigrants, particularly the unauthorized, are rapists and criminals and that they bring their problems with them to the USA. He also tied immigration from Latin America to a potential increase in terrorism in the country. Trump may not be taken seriously by some, but his conjectures have revved up anti-immigration sentiment, with other Republican presiden­tial candidates renewing proposals for building a wall along the US–Mexican border and advocating stricter immigration laws and enforcement. The underlying sentiment is that undocumented Mexican immigrants represent a clear “negative” to US society, a theory also applied to those from many other countries.