Former President Obama: "Serious mistake" to exit Iran nuclear deal
Former President Barack Obama is calling President Trump's decision to pull the U.S. out of the 2015 Iran nuclear deal a "serious mistake" and said walking away "turns our back on America's closest allies." Obama's statement was released after Mr. Trump's announcement Tuesday that the U.S. will withdraw from the nuclear agreement, which was reached in 2015 between the U.S., Russia, China, Iran, France, Germany and Britain. CBSN's Reena Ninan reports.