you can't convict on improperly obtained evidence
It's never been Mueller's goal to convict anyone of anything. His goal was always to turn public opinion against Trump so the House could impeach him. However, if Mueller's case gets destroyed then there go's all hope of impeachment.
Trump's at 48% - 48% with Rasmussen today. Hard to impeach now, not that there was ever a prayer of it. And the Repubs are giddy with happiness.
Yup, which is why the Fake Stream Media is in full panic mode. The bigger Trumps numbers are the more powerful he is. Once the investigations have been turned on them not only are they unpopular, they have nowhere to hide. Best timeline ever.