He wouldn’t at the trade deadline. In any event it’s unlikely the Nats will be out of contention enough to blow it up by then.
It's still a lot of money. And if Scherzer is in the block, it's likely because he spent significant time on the IL again.
Scherzer, Strasburg, and Corbin have almost no trade value due to their contracts. The only valuable assets on the team would be Turner, Soto, Robles, and Kieboom. And they have a ton of control, so there would be no point in trading them.