(Alicia A. Caldwell | The Associated Press) In this June 29, 2007 file photo, a portion of the U.S.- Mexico border near Columbus, New Mexico, shows the disputed metal pipe fence on the right that protrudes into Mexico by several feet. On the left is a temporary border made of steel railroad track. 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.