AP
The aides say their talks have shifted largely from whether he's going to run to when he's going to announce, sources told the Journal, noting that he could still change his mind if his grief over his recent son's death becomes overwhelming.
"It's my sense that this is happening, unless they change their minds," a source who spoke to Biden aides told the Journal.
His announcement date may depend heavily upon how Hillary Clinton fares during her October 22 testimony before a Republican-controlled House committee looking into the terrorist attack in Benghazi.
In an interview with "The Late Show's" Stephen Colbert last week, Biden acknowledged that he wasn't sure whether he was emotionally ready to run for president after the death of his son, Beau, from cancer. Ironically, Biden's genuineness during that interview has galvanized supporters who want him to run more than ever.