biden's issues back in law school, as well as his 1988 campaign, accused of using someone else's line in a speech. here's jon stewart recently. >> the reason loose lips mcgee [ bleep ] up his 2008 presidential run is now the reason he's a viable candidate? >> reporter: however often biden may make the funny headlines, his decades of experience, nearly four decades, have garnered him plenty of supporters, maybe hit that middle ground of those frustrated with clinton's e-mail problems, but not liberal enough to back bernie sanders. the latest poll of likely iowa caucus goers places biden third at 12%, but for biden, this is far more than political. his son beau, who just died in may, urged his father to take this chance and run with it. the 72-year-old has had to mull this over in the midst of grieving and working. now away from washington and thinking and discussing, it could be his deciding factor.