While Joe Biden hasn't officially launched his 2020 presidential campaign, he is walking and talking like a candidate, and it seems like a safe bet that he's running. The former VP is the best-known contender in the already-crowded field of Dem contenders. He shows up as the front-runner in most polling. According to the Associated Press, Biden is prepping a campaign that will cast him as an extension of Barack Obama's presidency and political movement. He's betting that most Democratic voters are ready to get back to the style and substance of the Obama era.
Obama and Biden are said to have agreed months ago that it would be best if the former president did not endorse any candidate early in the primary. That leaves Biden running as an "Obama-Biden Democrat" without Obama's explicit backing.