I think Trump isn't worried about becoming president again because as he's pointed out, the whole system is corrupt.
I also don't think Trump will directly bring them down. I think Trump and Q showed us who was connected in all of this, but once truth starts emerging, it will be them to bring themselves down as they start pointing fingers to save themselves. That's why Q wanted us to see the connections between them all. The politicians, wives, leaders, media, celebrities… they're all connected, and by one thing. Crime. Once the crime comes out, they'll have no one to point to except each other, but, they're all equally guilty. They will tear and destroy each other right before our eyes.