https://amgreatness.com/2019/05/02/the-mueller-investigation-is-the-fruit-of-a-poisonous-tree-there-must-be-pardons/
There is an important reason why courts do not admit evidence that stems from corrupt law enforcement or prosecutorial activity—evidence known in law as “the fruit of the poisonous tree.” If corrupt governmental activities lead to convictions, and the threat of such convictions is used to trample upon the rights of free citizens, then those citizens will not, in fact, be free. They will not be citizens at all, in the proper sense of the term. They will, instead, become subjects of tyranny, victims of a government which can work its will without regard to the due process protections provided both by the Constitution and the customs of our law.
These protections are the guarantors of our freedom, and central among them is the bedrock principle in the Constitution’s Fourth Amendment that “no warrants shall issue, but upon probable cause.” Criminal inquiries should never be rooted in insinuation and gossip, much less politically motivated malice.
Thanks to the reporting of John Solomon, Sara Carter, Julie Kelly, Gregg Jarrett and others, we know that the so-called Steele dossier formed much, if not all, of the basis of the “Trump-Russia collusion” probe. Written by a former British spy named Christopher Steele, the dossier is full of falsehoods about Trump and his alleged ties to Russia. It is nothing more than opposition research, produced at the behest of Hillary Clinton’s campaign and circulated by high-ranking officials in President Obama’s intelligence apparatus.