Across America, individuals and small businesses are increasingly buying and selling goods and services online. According to U.S. Census Bureau, the total online transactions in the U.S. grew from $3 trillion in 2006 to $5.4 trillion in 2012, to about a third of U.S. GDP. Increasingly, these transactions are cross-border: the United States is the world’s most popular market for the world’s ecommerce shoppers, and itself has 34 million online shoppers that buy from abroad. Beh