Vice President Joe Biden’s aides reportedly met with staff from the Democratic National Committee this week, a sign he may plan to enter the 2016 presidential race, The New Yorker reported Thursday, citing a DNC official. The Biden aides were said to have been briefed on “arcane but crucial rules” and details such as the primary calendar, filing deadlines, and state-by-state processes for selecting delegates and super delegates. Similar meetings were also held with Hillary Clinton, Bernie Sanders, Martin O’Malley, Jim Webb, and Lincoln Chafee. “I think it means he’s running,” the source told the magazine. A DNC spokesman did not confirm or deny that the meeting took place, according to The New Yorker.