'I'm not finished': Kamala Harris's Univision interview heats up when anchor repeatedly asks about border trip

Tensions flared during Vice President Kamala Harris's Thursday night interview with Ilia Calderon when the Univision anchor pressed the vice president on her not-yet-scheduled trip to the U.S.-Mexico border.

Calderon opened the terse exchange by asking Harris when she will visit the border, as she promised this week under criticism during an uneven trip to Guatemala and Mexico.

The vice president began her answer by noting she's "said I'm going to the border," before Calderon interrupted her and reiterated her question.

"I'm not finished," Harris answered, pausing briefly before continuing her response. "I've said I'm going to the border, also, if we are going to deal with the problems at the border, we have to deal with the problems that cause people to go to the border, to flee to the border."

When Calderon asked a third time about the timing of the forthcoming trip, Harris said she would "keep you posted."

Harris has fended off similar questions in recent months, but an interview with NBC's Lester Holt during her two-day tour of Guatemala and Mexico and the subsequent fallout prompted her to finally commit to scheduling a border visit.

Prior to her trip, and even in her answers during the Holt interview, the vice president claimed that her role in addressing the immigration crisis is to examine and address the root causes in Central and South American countries that are forcing people north. She had insisted that Department of Homeland Security Secretary Alejandro Mayorkas is overseeing the day-to-day situation at the U.S.—Mexico border, and she, therefore, does not need to visit.