The mayors of Chicago, New York City and Denver have renewed pleas for more federal help and coordination with Texas over the growing number of asylum-seekers arriving in their cities by bus and plane. The mayors held a news conference Wednesday. Their requests come as U.S. cities have struggled to manage the increasing number of migrants sent from Texas and other states. Republican Gov. Greg Abbott’s busing operation has sent more than 80,000 migrants to Democratic-led cities since last year. His administration stepped up the practice last week and started sending chartered planes.