The Saturday Wall Street Journal had a piece that worried about President Donald Trump’s decision to add more tariffs to People’s Republic of China’s goods just prior to another round of trade talks with the PRC.

[T]he decision’s timing risks deepening the already bitter trade fight by starting another tit-for-tat round of tariffs.

And

The tariffs are bound to complicate—if not derail—talks with top Chinese officials, which are currently scheduled in Washington for Sept 27 and Sept 28, say people familiar with the plans.

Another interpretation, carefully ignored by the authors, is that in any conflict, it’s necessary to keep pressure on the opposing side while negotiations occur.  The battlefield shapes the talks, and the talks shape the battlefield–the battlefield encompasses both the talks and the conflict.