Former Bill Clinton adviser: Only one thing is keeping Hillary out of the 2020 race

https://www.marketwatch.com/story/former-bill-clinton-adviser-hillary-feels-god-put-her-on-earth-to-be-president-but-one-thing-is-keeping-her-from-running-2019-10-28

Why did the [D] party suddenly rally around Biden?

Were deals made to ensure that Biden became the forerunner?

What kind of deals did Biden recently make with Sanders?

What is that "one thing" keeping Hillary from running herself?

If the presidential nominee becomes ineligible for office [sudden health issues] then who becomes the new nominee?

Who will "she" pick as her new running mate?