Today's definition of checkmate seemed a little short to me: "1. A move that places the king in a position from which there is no escape, as every move results in defeat."

That could describe stalemate as well as checkmate. In the former position, the king is not in check but he will be in check as a result of every possible move. In checkmate, the king is in check and he will remain in check with every possible move.

Just splitting hairs. I do think the theme of words from chess is appropriate considering the events of this month.