What he's alluding to is that currently conservative voices seem utterly incapable of just not lying. Fox has progressed from a bias, to misinformation, to now

What he's alluding to is that currently conservative voices seem utterly incapable of just not lying. Fox has progressed from a bias, to misinformation, to now just straight up disinformation. When that is the other "side", then honesty will seem biased. The middle is would be something like lying 25% of the time.