President-elect Donald Trump’s vow to begin deporting undocumented immigrant criminals means confronting two of the United States’ biggest trading partners as well as dozens of other countries, allies and foes, that have refused to cooperate on the issue or that significantly delay the repatriation process. The State and Homeland Security departments list 23 countries as “uncooperative” for refusing to take back many of their citizens who came to the United States — in some cases decades ago — and have been ordered deported after receiving felony convictions. In most cases, the immigrants, who do not hold U.S. citizenship, have no passport or birth certificate to prove their original citizenship, and their home countries refuse to issue new travel documents. ...
