Abortion dramatically disrupts the normal hormone levels of early pregnancy. The problem is not that abortion "causes" breast cancer. but that it accelerates cancer growth in women with hormone receptor-positive (ER-positive and/or PR-positive) breast cancers.
And that's not a proper question to throw into a judicial hearing. It's irrelevant to judge selection. They're just throwing anything in there, anything at all, to derail Vitter.
Your second paragraph cuts to the point. And you nail it.
FWIW, there is no history of cancer in my mother’s or father’s family. That said, my sister had an abortion in her 20’s, and had breast cancer in her 40’s. Sure, it’s anecdotal, but still...