Joe Biden Considering Potential Presidential Bid

If the vice president does decided to run, this will be his third attempt at the White House.
2:10 | 08/03/15

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Transcript for Joe Biden Considering Potential Presidential Bid
Vice president Joe Biden. And there are reports it's someone very close to his heart that urged him to do it. Mary Bruce is at the white house tonight. Reporter: Tonight, the question facing Joe Biden, to run or not to run. His advisors telling ABC news, Biden's political team is ramping up. Clear signs that he's considering jumping in the race for the white house. Hi, how are you? Reporter: His chief of staff quietly talking to Biden's supporters and democratic donors. In the past, Biden's been clear, he's interested. Yes, there's a chance, but I haven't made up my mind about that. Reporter: One thing weighing on his decision. My father, my hero, Joe Biden. Reporter: His son beau, who died of cancer just two months ago. The "New York times" reporting that on his deathbed beau had a mission -- he tried to make his father promise to run. Biden's a tested campaigner. So give me a break. Reporter: This would be his third run at the white house. But from his touchy-feely side to his blunt straight talk. Biden is also a master of the faux pas. A Biden run could complicate things for president Obama, forcing him to choose between his number two and his former secretary of state. So far, the president isn't taking sides. Not only have I run my last election, but I am not in the business of prognosticating future elections. Reporter: No decisions have been made yet. Biden says he will make up his mind by the end of the summer. Tom? Thank you. And let's bring in Jonathan Karl. The race is well under way. Does the vice president have enough time to raise enough money and pose a serious threat to Hillary Clinton? He would start way behind on fund-raising, organization, and popular support. But he would instantly give Clinton a formidable challenger. He could give her a run for the money. We would have a real race on the democratic side. Jon, thank you so much.

This transcript has been automatically generated and may not be 100% accurate.

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