Since 1975, the United States has resettled nearly three million refugees

I dont think this current Border Crises is by chance. There has been efforts by the UN to increase Refuge numbers into the US for decades.....

Since 1975, the United States has resettled nearly three million refugees, more than all
other countries combined. In federal fiscal years (FY) 2009 and 2010, the US Refugee
Admissions Program (USRAP) resettled close to 75,000 refugees per fiscal year (US
Department of State 2011d).1 The refugee admission ceiling for this formal resettlement
program was set at 80,000 for FY2008 through FY2011. An unknown percentage of these
refugees voluntarily moved within the country after arrival, in what has been termed
‘secondary migration.

http://www.unhcr.org/4e5f9a079.html