Should Hillary Divorce Villaraigosa?

What exactly is a "national co-chair" of a presidential campaign? Is it like a dinette set or something?

Anyway, Hillary Clinton has apparently appointed, as "national co-chairs" of her campaign, the following people so far:

U.S. Senator Bob Menendez;
Los Angeles Mayor Antonio Villaraigosa;
U.S. Senator Barbara Mikulski;
Former Iowa Goveror Tom Vilsack;
Florida Contresswoman Debbie Wasserman-Schultz;
Flordia Congressman Alcee Hastings;
Ohio Rep. Stephanie Tubbs;
California Assembly Speaker Fabian Nunez; and
Former National Council of La Raza President Raul Yzaguirre.

Remember those "Members Only" jackets in the 1980's? Looks like being a "National Co-Chair" is equally exclusive, which is to say, "not very."

Anyhow, here's my question for you: Given that she has more co-chairs than your grandmother's table at Thanksgiving -- shades of Dan Rather, I know -- should she consider showing co-chair Villaraigosa the door? I mean, his current personal difficulties sort of bring up her past difficulties, which maybe detracts from whatever her platform is. Or is the title so meaningless as not to matter?