Vulnerable Dem senator credited with recruiting Harris to Senate still hasn’t endorsed her for president

It appears you’re referring to a situation where a Democratic senator, who was instrumental in bringing Kamala Harris into the Senate, has not officially endorsed her for the presidency. I can find more specific information if you provide me with names. It’s not uncommon for politicians to hold off on endorsements until later stages of a campaign, often to see how candidates perform, develop policy and gain public support.