Why Ukraine aid could fail in the US Congress. The background is a domestic political dispute between Republicans and Biden's Democrats over irregular migration.
Republicans are accusing Biden and the Democrats of not taking tough enough action on the country's southern border. Thousands of people come to the U.S. every day, mostly from Latin America and the Caribbean, fleeing poverty and conflict in their home countries. In December, the US Border Patrol reported around 250,000 arrests - more than ever before in a month.