Democratic presidential candidate South Bend, Ind., Mayor Pete Buttigieg speaks with Sen. Elizabeth Warren, D-Mass., during a commercial break in the November Democratic presidential primary debate in Atlanta. They are back onstage Thursday in Los Angeles.

Democratic presidential candidate South Bend, Ind., Mayor Pete Buttigieg speaks with Sen. Elizabeth Warren, D-Mass., during a commercial break in the November Democratic presidential primary debate in Atlanta. They are back onstage Thursday in Los Angeles.