Sessions has gone on record saying that the Civil Rights Act of 1964 and the Voting Rights Act of 1965 were total mistakes and should be scrapped. Like I said above, I am confident he's a segregationist.
This would remove penalties for excluding protected classes from commercial activities such as performing public activities (eg: marrying mixed race couples), allowing customers (eg: no blacks allowed in my business, no black tenants in my buildings) or hiring from certain demographics (eg: now i can fire all those Catholics, Jews and negroes that I've been forced by law to share office space and write paychecques to).
This was somewhat provoked by the wedding cake and marriage refusal cases in the last few years. The concept of gays as a protected class raised the question of whether the concept is an undue burden on bigots' rights. If gays aren't a valid protected class, then the argument goes, maybe neither are mixed race couples. Why one and not the other? Good question, but I have a different answer than they do.
Another one is marijuana decriminalization. The state level laws can easily be overruled by a federal ban.
Anti-sodomy laws, anti-pornography laws, perhaps even anti-contraception laws. The latter two are important to Catholics, and also consistent with Protestant Quiverful and abstinence only initiatives, so there's a lot of support. This is why "pornography is an imminent health crisis" is in the [
current GOP platform]. They pitch the claim that pornography is a gateway to pedophelia, so there's a lot of support.