Why did Dianne Feinstein wait for September to refer the Christine Blasey Ford letter to the FBI and not in July?

Why didn't she bring this up to Brett Kavanaugh when she personally interviewed him?
Why wasn't it part of the record 1,137 questions given to him answer?
Why wasn't it brought up in the initial hearings?
The letter was given to only 2 people who she asked to keep her anonymous but it was leaked anyways. So who was it that was disrespectful to her wishes?

In case she needed to delay the vote, which is what happened.

To stall thing, pg. 3 of DNC dirty tricks

Ford asked that the letter remain confidential because if it was made public she would be harassed, called names, and possibly receive death threats. She was correct.

She plays games with American lives.

To do as much damage as possible to Kavanaugh's chances on the eve of his confirmation. The whole thing is so obvious it's hard to understand why we're having this conversation at all.

Dianne was drunk and forgot she had the letter

It's called Political Posturing to influence an outcome. Ford has turned out to be a liar which has cost Democrats votes. Kavanaugh for SCOTUS

She owes Cons no explanation.