OPINION: Mueller's silence let Trump supporters fill the void

In the end, Robert Mueller's silence betrayed him.

All his life, the Vietnam War Marine veteran has lived out a code of discreet personal values -- elevating government service, the rule of law and respect for the chain of command.

But now, the uproar triggered in the wake of Mueller's Russia investigation raises the question of whether his time-honored methods have left him vulnerable to exploitation in a new political era of hyper-partisanship and self-aggrandizing.

And the discord is increasing calls for Mueller to break his silence in the most...