Anyone who's seen "August: Osage County" on stage knows that the role of Violet Weston, originated by Deanna Dunagan in the Steppenwolf Theatre production of Tracy Letts' play in Chicago and later reprised in a Tony-winning turn on Broadway, is catnip for any actress. Full of broad strokes and opportunity for chewing the scenery, it's a role that would have put whoever ended up with the film gig -- certainly Meryl friggin' Streep -- right in the middle of the Oscar race.
It's a clear leading role in a play with two of them (the other being Violet's daughter Barbara, originated by Amy Morton on stage and played by Julia Roberts in the film). Both, in fact, were nominated for Tonys, but the "bigger" role of Violet naturally brought in the attention and, ergo, the awards. So I don't quite know how you shuffle that performance, particularly coming from Streep, over to a supporting actress campaign, as Gold Derby is reporting, unless there has been some tinkering done with the script to make Barbara more of a fulcrum for the thing (which she kind of already is to an extent).