Donald Trump speaks to the media at the U.S.-Mexico border in July. The Libre Initiative's letter doesn't call out any candidates by name, but Trump has called for mass deportation and an end to birthright citizenship for immigrants.
New Jersey Gov. Chris Christie stands with (from left) his wife, Mary Pat Christie, and their children, Patrick, Sarah, Andrew and Bridget, on Tuesday at Livingston High School in Livingston, N.J.
Sen. Lindsey Graham, R-S.C., speaks to members of the media after visiting the memorial site at the Emanuel African Methodist Episcopal Church in Charleston, S.C., where nine people were killed.