Khan met Trump and Iranian President Hassan Rouhani on the sidelines of this week's United Nations General Assembly, before which he visited Crown Prince Mohammed bin Salman in Saudi Arabia.
Introduced by Congressman Tom Malinowski, the House of Representatives passed the Saudi Arabia Human Rights and Accountability Act by a whopping 405 votes.
Saudi Arabia, the world's top oil exporter, was once awash in petrodollars. But a slump in oil prices has made fiscal discipline and diversification away from oil vital.
Here' a look at the major pivots of the past year and the reforms to come in 2018: