"Can imagine what Nelson Mandela would say," Leahy tweeted.
A bipartisan group of House members has proposed a resolution honoring the life of Nelson Mandela, the anti-apartheid icon and former South African president who died last week.
Amie Parnes 12/10/13 07:13 AM EST
The president compared the late anti-apartheid icon to Gandhi and Lincoln in his remarks.
Fighting between Christians and Muslims has claimed more than 400 lives in two days.
Obama will also try to meet with the Mandela family and South Africa's president.
Defense Secretary Chuck Hagel is directing the military to transport troops from Burundi to the Central African Republic.
Johannesburg expects event to be “among the biggest gatherings of world leaders."
Obama is expected deliver remarks about Mandela’s legacy at some point during the trip.
Speaker John Boehner has tapped the Illinois Republican to lead the House delegation.
Baker said he was "amazed" at Mandela's soft spokenness and conviction.