Migrant Numbers Surge, With 3,700-Plus Unaccompanied Children In U.S. Border Patrol Custody; House Minority Leader Kevin McCarthy To Visit Border On Monday; CDC: One In Five Americans Has Received At Least One Vaccine Dose; Biden Turns Focus To Touting And Implementing $1.9 Trillion Relief Package; New Wave Of Lockdowns For Italy As Viruses Spreads; Small Change In CDC Data Tracking Causes Bump In Daily Vaccinations; How Broadway Looks To Stage A Comeback After COVID-19.