I think Portland is going back to Miami to give them an opportunity to match/beat Toronto's offer.
I found this guy on Toronto's board with this message:
https://forums.realgm.com/boards/viewtopic.php?f=32&t=2321128&start=262#wrap
I looked up his other posts and he seems to have a very good handle of the Front office situation.     I have to 100% believe that Joe would go back to Miami and ask them to beat the offer.   If they don't, then it's a much easier sell to Dame where you can legitimately tell him we gave Miami every opportunity to show us they wanted to have you.... but they weren't willing to negotiate in good faith.
I'm guessing we'll hear something official tomorrow.