Donald Trump has promised to deport 11 million undocumented migrants and build a wall along the U.S.-Mexico border. He has said Mexico will pay for the barrier that could harm relations with one of the nation's biggest trade partners. 
 
 "I would build a great wall, and nobody builds walls better than me, believe me, and I’ll build them very inexpensively," Trump said, announcing his candidacy on June 16, 2015. "I will build a great, great wall on our southern border. And I will have Mexico pay for that wall." 
 
 There are nearly 2,000 miles separating Mexico and the United and about 650 miles already have vehicle and pedestrian fencing, according to a 2016 report from the U.S. Government Accountability Office. Building his wall could require about 339 million cubic feet of concrete, or three times what was used to build the Hoover Dam. 
 
 Trump has said his wall could cost up to $12 billion, but a Washington Post study estimated the wall would cost $25 billion. It will be made of precast concrete and reach up to 50 feet. He has said he will force Mexico to pay for the wall by blocking Mexicans who want to send money from the United States back home to Mexico from doing so if they don't show documentation proving their legal status. Mexico receives about $24 billion each year from people sending money from the United States. 
 
 "It's an easy decision for Mexico: make a one-time payment of $5 (billion)-10 billion to ensure that $24 billion continues to flow into their country year after year," Trump said on his campaign website. 
 
 Trump visited Mexican President Enrique Peña Nieto in Mexico City in August, but said he didn't bring up the wall debate. Before the meeting, Peña Nieto had compared Trump to Adolf Hitler. 
 
 "Who pays for the wall? We didn't discuss," Trump said during a news conference following their meeting in Mexico City. "We did discuss the wall. We didn't discuss payment of the wall. That'll be for a later date." 
 
 Peña Nieto later said the political leaders had discussed the wall and he had "made it clear" that Mexico wouldn't pay for it. "At the start of the conversation with Donald Trump, I made it clear that Mexico will not pay for the wall," Peña Nieto tweeted. He also called Trump "a threat to Mexico." 
 
 There could be other consequences if the wall goes up. Trade between the U.S. and Mexico reached an estimated $583.6 billion in 2015, according to the Office of the U.S. Trade Representative. But that could plummet if a border wall turns away Mexican shoppers who buy food, clothing and other goods in U.S. border towns. 
 
 Trump announced his campaign in 2015 by calling many Mexican immigrants "rapists" and "criminals." ||||| President-elect Donald Trump’s hard-line immigration stance was a central part of his campaign message in 2016 -- and he said in an interview Sunday that he plans to immediately deport approximately 2 to 3 million undocumented immigrants. 
 
 “What we are going to do is get the people that are criminal and have criminal records, gang members, drug dealers, where a lot of these people, probably 2 million, it could be even 3 million, we are getting them out of our country or we are going to incarcerate,” Trump said in an interview with CBS’ “60 Minutes.” “But we’re getting them out of our country, they’re here illegally.” 
 
 He continued by saying that after the border is “secure,” immigration officials will begin to make a “determination” about the remaining undocumented immigrants in the U.S. 
 
 60 Minutes interview: President-elect Donald Trump 
 
 “After the border is secure and after everything gets normalized, we’re going to make a determination on the people that they’re talking about who are terrific people, they’re terrific people but we are gonna make a determination at that,” he said. “But before we make that determination...it’s very important, we are going to secure our border.” 
 
 Asked whether he really plans to build a wall along the U.S.-Mexico border -- a proposal that served as a centerpiece of his campaign message -- Trump replied, “Yes.” 
 
 Since Trump’s election on Tuesday night, the realities of actually building that wall have begun to set in. The Mexican government has publicly reminded him that Mexico will not pay for the wall. And asked about the wall, Trump transition co-chair Newt Gingrich said the wall was “a great campaign device.” 
 
 Trump also told “60 Minutes” that the border wall, which was one of the centerpieces of his campaign platform, could be part wall and “some fencing,” in accordance with what congressional Republicans have proposed. 
 
 “For certain areas I would, but certain areas, a wall is more appropriate,” he said. “I’m very good at this, it’s called construction.”
– President-elect Trump has provided the first glimpse at his upcoming policies in an interview with CBS' 60 Minutes, specifically on immigration: He says his first priority will be arresting and deporting undocumented immigrants with criminal records. "What we are going to do is get the people that are criminal and have criminal records, gang members, drug dealers, where a lot of these people, probably two million, it could be even three million, we are getting them out of our country or we are going to incarcerate." Trump made hardline immigration policy a big part of his campaign, calling at times for the forced deportation of all undocumented immigrants, a temporary ban on Muslim immigration, and the construction of a wall across the border with Mexico (paid for by Mexico). Asked about his plans to build the border wall (which has been estimated to cost between $12 billion and $25 billion, the International Business Times says, depending on whom you ask), the president-elect had a simple answer: "Yes." He says he is open to the idea that some sections could be simple fencing. "For certain areas I would, but certain areas, a wall is more appropriate,” Trump said. He added, “I’m very good at this, it’s called construction." Once the border is "secure," Trump promises to turn his attention to undocumented immigrants with clean records. Hedging his language, all Trump would tell 60 Minutes about potentially deporting that group is that "they’re terrific people, but we are gonna make a determination at that."