Some political scientists maintained that setting economic interdependence as a foreign policy goal may have exposed the United States to manipulation. As a result, the U.S. trading partners gained an ability to influence the U.S. foreign policy decision-making process by manipulating, for example, the currency exchange rate, or restricting the flow of goods and raw materials. In addition, more than 40% of the U.S. foreign debt is currently owned by the big institutional investors from overseas, who continue to accumulate the Treasury bonds.[77] A reporter for The Washington Post wrote that "several less-than-democratic African leaders have skillfully played the anti-terrorism card to earn a relationship with the United States that has helped keep them in power", and suggested, in effect, that therefore foreign dictators could manipulate U.S. foreign policy for their own benefit.[59] It is also possible for foreign governments to channel money through PACs to buy influence in Congress.