FILE - In this July 6, 2009 file photo, an American flag flies during a ceremony in front of the completed Smuggler's Gulch project along the U.S.-Mexico border in San Diego. President Donald Trump is not giving up on his demands for $5.7 billion to build a wall along the U.S.-Mexico border, saying a physical barrier is central to any strategy for addressing the security and humanitarian crisis at the southern border. Democrats argue that funding the construction of a steel barrier along roughly 234 miles will not solve the problems. (AP Photo/Denis Poroy, File)