The field narrowed after the results of the contests on 3/3. Biden had the lead at the end of that day and it only grew after that.
It's more likely they endorsed him out of self interest because it was clear he would win and they wanted to be considered for the VP pick or other posts. Conspiracy is much less likely and viewing it through that lens (without evidence) is more a reflection or one's beliefs than the actual events.
That's not true.
https://i.imgur.com/EnsuC7N.jpeg
https://www.bloomberg.com/graphics/2020-presidential-delegat...
The field narrowed after the results of the contests on 3/3. Biden had the lead at the end of that day and it only grew after that.
It's more likely they endorsed him out of self interest because it was clear he would win and they wanted to be considered for the VP pick or other posts. Conspiracy is much less likely and viewing it through that lens (without evidence) is more a reflection or one's beliefs than the actual events.