President Trump's signature issue during the campaign was a "big, beautiful wall" spanning the southern border and paid for by Mexico. Trump has insisted that any immigration deal must include funding for a wall, but he has recently appeared more flexible on the details. Here's Kellyanne Conway explaining the latest thinking on CNN:
"After conferring with the experts who are involved in this process, Christopher, the president has discovered that part of it, he knows, will be the physical wall, part of it is better technology, part of it is also fencing."
Why it matters: That's not what Trump promised in 2016, but it might indicate where a compromise could lie: a border security package that includes a smaller stretch of wall and other elements, like improved technology, that mainstream Republicans have advocated for years and Democrats are more willing to accept.