One would think that would sufficient to completely pole-ax any Government investigation into Manafort for any and all reasons having to do with the Trump campaign, or anything else.
In a normal criminal case, if the government is found to have obtained evidence illegally at any time during the investigation, their whole case can get thrown out. The defense will argue that they committed a criminal act by infringing on the defendant's rights under the Constitution, and that not only is the evidence they collected illegally tainted and therefore inadmissible in court, but all the evidence collected after is tainted also, the "fruits of a poisonous tree" doctrine.
Of course, I doubt this will make any difference to Mueller, who seems to operate outside the law, like everyone else in D.C.
Time for the President to end the Meuller charade! Veto Meuller!