A record number of migrants have arrived at the U.S.-Mexico border, as war and poverty push people from their homes worldwide. The Post’s Nick Miroff reported from the border and saw how the Biden administration is grappling with migration as we enter a pivotal election year. Read more:In recent weeks, a historic number of people have arrived at the U.S.-Mexico border.  It’s a rise happening as Democratic lawmakers push for aid to Ukraine and Israel, while Republican negotiators want a border crackdown tied to foreign funding.The Post’s Nick Miroff recently spent time in southern Arizona, now one of the busiest places for unauthorized crossings. He saw how migrants hike along the border for miles, hoping to find U.S. officials to take them in. Often, they are brought to facilities that are already maxed out. “The last six months have shown, as the numbers continue to rise higher and higher, that the administration's approach is really kind of nearing a point of exhaustion,” Miroff said. Today’s show was produced by Sabby Robinson, mixed by Rennie Svirnovskiy and edited by Monica Campbell. Thanks to Debbi Wilgoren. Subscribe to The Washington Post here.