No. "We" is used all the time by defense lawyers and the like. It doesn't at all imply that he agrees. Mining his arguments as a lawyer for statements about abortion is 100% useless.
He's Catholic and conservative though, so he probably does oppose abortion. We just can't say for sure going by what is on the record.
Thanks for being on subject. Can you cite me an instance of a lwayer using "we" when he did not hold a position?