US President Donald Trump asked Congress for $4.5 billion in emergency funds to address what he described as a "humanitarian crisis" at the U.S.-Mexican border.
According to administration officials the money would be used to handle an influx of migrants, but not Trump's proposed border wall.
Acting director of the Office of Management and Budget Russel Vought wrote to congressional leaders in the White House, ""The situation becomes more dire each day. The migration flow and the resulting humanitarian crisis is rapidly overwhelming the ability of the Federal Government to respond."
The request is likely to run into opposition from Democrats concerned with the administration's overall approach to immigration.