Jury selection is set to start as Donald J. Trump faces charges he faked business records to cover up a sex scandal before winning the presidency in 2016. It is the first criminal trial of a former president.
It's called voir dire, and it's more complicated than that. For a case this size the counsels will likely have done focus groups to see what traits, etc. tend to test well against the client. So yes, they are theoretically screening for biases, but the selection is ultimately up to both councils, so it's a balancing act of stacking the jury in your favor.