Then-White House Communications Director Jen Psaki listens to President Barack Obama make a statement on April 2, 2015. Psaki will be Biden’s press secretary.

White House Communications Director Jen Psaki listens to US President Barack Obama makes a statement at the White House in Washington, DC, on April 2, 2015 after a deal was reached on Iran’s nuclear program. Iran and world powers agreed on the framework of a potentially historic deal aimed at curbing Tehran’s nuclear drive after marathon talks in Switzerland.AFP PHOTO/NICHOLAS KAMM (Photo credit should read NICHOLAS KAMM/AFP via Getty Images)