Congress approved International Megan's Law in a voice vote on Monday. The bill contains a provision that requires the State Department to mark the passports of registered sex offenders with a "unique identifier."
Proponents say the bill will prevent sex trafficking. Opponents say it amounts to little more than a scarlet letter that will prevent U.S. citizens from traveling abroad.
Read more from The Marshall Project.
With Justice for All: Facts hard to find in House debate on the bill.