Nelson Mandela's health is improving, according to two of his granddaughters.
"Our grandfather is doing very well," Zaziwe Dlamini-Manaway told ITV News Africa Correspondent Rohit Kachroo.
"He is stable but critical, but he is doing much better."
Swati Dlamini said she had been seeing a lot of the former South African president in hospital.
"We spend a lot of time back and forth to Pretoria," she said.
More top news
State Department spokeswoman Heather Nauert said Pence "was ready to take this opportunity."