Is there a particular reason you ask this question?
I was curious as to whether a bird-in-the-proverbial-hand (or seemingly so) counts more than one in the bush as I suspect some Democratic Committee members or any political committee for that matter, being human, would have a preference depending on how well he/she knows a candidate.
Once any individual is in the voting booth, it’s his or her choice as to which lever to pull. Certainly, as individuals, Committee members (like anyone else) have their own preferences and biases. However, our “official” position—and the position of any one of us purporting to represent the Committee—is that we support all Democratic candidates equally.