Trump's border security ideas evolved on the hustings, as he frequently exhorted supporters at his rallies in chants of "Build that wall!" Earlier in the year, the pair had a contentious phone call about the border wall. U.S. border patrol officers walk on Oct. 26 near a prototype for Trump's border wall developed by Fisher Sand and Gravel Co of Tempe, Ariz. (Jorge Duenes/Reuters)Jan. 6, 2018: At what cost? The Wall is the Wall, it has never changed or evolved from the first day I conceived of it. "The Wall is the Wall, it has never changed or evolved from the first day I conceived of it," the president says on Twitter.

Source: CBC News January 24, 2018 14:53 UTC