NBC News veteran Tom Brokaw has been selected to take over the late Tim Russert's duties as host of "Meet the Press" through the end of the 2008 election.
NBC Nightly News anchor Brian Williams made the announcement on Sunday as he filled in on "Meet the Press".
The show resumed Sunday with the episode that Russert had been planning before his death: Senators Joe Biden and Lindsey Graham previewed a sharp-elbowed fight for the White House.
Biden was asked to explain why Barack Obama broke his pledge to stick to public campaign financing.
"I'm not going to color that, he's changed his position. The fact of the matter is, he has over 1,400,000 contributors, the vast majority of whom contribute less than 100 bucks a piece," he said.
That could allow obama to raise and spend more money than any candidate in history.
"Is it 1.4 four million donors that allows you to break your word? This is reinforcing everything that's wrong with politics. This is a game changer in the general election," Graham retorted.
Biden accused John McCain of changing his position on offshore oil drilling.
"If you talk about flip-flopping, you've got John McCain all the sudden deciding now we should drill in 600 million acres offshore that he adamantly opposed before," Biden said.