Iran is studying ways to keep exporting oil and other measures to counter U.S. economic sanctions, state news agency IRNA reported Saturday. Since last month, when U.S. President Donald Trump pulled out of the nuclear deal that lifted most sanctions in 2015, the rial currency has dropped up to 40 percent in value, prompting protests by bazaar traders usually loyal to the Islamist rulers. Speaking after three days of those protests, supreme leader Ayatollah Ali Khamenei said the U.S. sanctions were aimed at turning Iranians against their government. Other protesters clashed with police late Saturday during a demonstration against shortages of drinking water. “They bring to bear economic pressure to separate the nation from the system … but six U.S. presidents before him [Trump] tried this and had to give up,” Khamenei said on his website Khamenei.ir. With the return of U.S. sanctions likely to make it increasingly difficult to access the global financial system, President Hassan Rouhani has met with the head …