Sen. Chuck Grassley (R-IA), a longtime abortion opponent, argued this week it would be unconstitutional to criminalize interstate travel for those who cross state lines for abortion.

After the Supreme Court’s decision last month in Dobbs v. Jackson Women’s Health Organization struck down its previous ruling in Roe v. Wade, several states moved to ban or restrict abortion, prompting some abortion rights activists to argue women who travel to other states for abortions or those who travel with them may be at risk of prosecution. It’s an argument some abortion opponents, including Grassley, disputed.