Running against Hillary probably wouldn't have gotten her anywhere anyway; Bernie tried it and look where it got him. The DNC had everything rigged in Hillary's favor, so Warren wouldn't have had a chance there. Maybe that's why she didn't want to run. But if offered a VP spot, that might have gotten her interest because then she wouldn't have had to run against Hillary, and would have at least been able to supposedly have an effect on Hillary's positions. Maybe she wasn't ready, but it's not like she's some youngster either, she's in her 50s or 60s now I think.