When a defense attorney thinks that the jury pool is biased in some significant way he or she will make a challenge of?

When a defense attorney believes the jury pool is biased, they will typically make a challenge for cause. This challenge requests that the court dismiss a potential juror based on specific biases or prejudices that may affect their impartiality. If the judge agrees, that juror is removed from the pool. The attorney may also use peremptory challenges to exclude jurors without stating a reason, but these are limited in number.