Warren knows perfectly well she could never win the Presidency.
On the other hand, she has a state where she can be elected Senator and have a nice public life.
What is an intelligent woman likely to do?
Neither could a man named Hussein, after 9-11. Never underestimate the ignorance of American voters, or the power of (free)money.
Warren is dying to be someone’s VP candidate.
They won’t win, but it will boost her speaking fees.
THAT is what she wants.