On the Republican side, Donald Trump has continued his lead, surging to 23 percent support in the Iowa poll. On Saturday, hundreds of immigrants rallied outside Trump’s speech in Nashville, Tennessee, protesting Trump for vowing to deport all undocumented people and for calling Mexican immigrants “rapists.” Fellow Republican candidate New Jersey Governor Chris Christie meanwhile told an audience in New Hampshire Saturday he would track immigrants like FedEx packages.

Gov. Chris Christie: “So here’s what I’m going to do as president. I’m going to ask Fred Smith, the founder of FedEx, come work for the government for three months. Just come for three months to Immigration and Custom Enforcement and show these people. Because guess what. Of the 11 million people who are here illegally, 40 percent of them didn’t come in over the southern border; 40 percent of them came in legally with a visa and overstayed their visa. We need to have a system that tracks you from the moment you come in, and then when your time is up, whether it’s three months or six months or nine months or 12 months, however long your visa is, then we go get you.”

Republican presidential contender and Wisconsin Governor Scott Walker has also made headlines with his most recent remarks on immigration, telling NBC’s Meet the Press building a wall between the United States and Canada is a “legitimate issue for us to look at.”