Huzzah! In a surprise announcement this morning, the president ordered the Justice Department to stop enforcing the Defense of Marriage Act (DOMA), the long-reviled federal law that defines marriage as between a man and a woman.

Obama wrote a long letter about the decision, arguing that DOMA is unconstitutional. From the letter:

Much of the legal landscape has changed in the 15 years since Congress passed DOMA. The Supreme Court has ruled that laws criminalizing homosexual conduct are unconstitutional. Congress has repealed the military’s Don’t Ask, Don’t Tell policy. Several lower courts have ruled DOMA itself to be unconstitutional.