With more than 11 million undocumented immigrants in the U.S., Trump's Operation Aurora would cost billions of dollars.

Donald Trump singled out Aurora, Colorado, as an example of immigrant crime that he would solve with mass deportations. Colorado’s governor says he welcomes federal help to deport gang members but will oppose broader plans for migrant deportation.

Pope Francis has condemned President-elect Donald Trump ’s calls for mass deportations in the U.S. The Catholic Church ’s leader called Trump’s plans a “disgrace” in a Sunday interview on the Italian talk show Che Tempo Che Fa, a show by Banijay Italia’s L’Officina.