What's weighted more heavily-undergrad GPA or graduate GPA?

[MettaSutta]

I excelled academically in undergraduate (magna cum laude, Phi Beta Kappa, etc.) but completely floundered in my JD program-sub-3.0 GPA, ~35th %ile of the class, no Latin honors, etc.  I also took medical leave, so there are a bunch of withdrawals on my transcript.   Will this be a serious red flag? I'm concerned that admissions offices will see my law school performance and question whether I am truly intellectually capable of successfully completing graduate-level work..