Long-time pro-mass immigration billionaires Charles and David Koch became the latest force to pressure congressional Republicans to nullify the end of DACA with a legislative amnesty Thursday. Koch spokespeople said the brothers will throw their weight behind the growing effort to force a two-house GOP majority that has refused to pass either funding for the southern border wall or the RAISE Act, a key nationalist immigration reform, to quickly pass an amnesty for those who were once exempted from federal immigration law under President Barack Obama’s DACA. The Koch amenability to open borders and amnesty is nothing new. In 2013,...