I am not sure. In a federal court criminal case, can a judge deny a defense challenge in voir dire even if the defense insists on removing a juror? >
There are two forms of challenge, and each side is given an equal amount of peremptory challenges, and then there is challenge for cause which can be made at any time.
If this was a peremptory challenge denied by the judge, it is mistrial.
Ask yourself: “Why would this Alinsky-ite Obama judge want a mistrial?”
I have not red anything about the defense asking for a change of venue. Either it happened and the media didn't cover it, or it did and internet search didn't find it.