Yes, there will be a press conference with Senate President Don Williams and John DeStefano this afternoon at 3:30 in the LOB.
I have no idea what it's about--the advisory just says "Two days before Democratic convention, DeStefano and Williams to make campaign announcement," (the DeStefano campaign likes to mess with us). My gut tells me it's just an endorsement, but we'll see.
DeStefano/Williams, if true, might be enough to swing the convention DeStefano's way. An endorsement probably won't.