Executive changes

Former U.S. Ambassador to Ukraine Marie Yovanovitch, right, testifies before the House Intelligence Committee on Capitol Hill in Washington, Friday, Nov. 15, 2019, in the second public impeachment hearing of President Donald Trump's efforts to tie U.S. aid for Ukraine to investigations of his political opponents. (AP Photo/Susan Walsh)

Democratic presidential candidate Sen. Kamala Harris, D-Calif., left, and Sen. Bernie Sanders, I-Vt., gesture to each other during a Democratic presidential primary debate hosted by CNN/New York Times at Otterbein University, Tuesday, Oct. 15, 2019, in Westerville, Ohio. (AP Photo/John Minchillo)

FILE - In this Oct. 9, 2019, file photo a member of the United Auto Workers walks the picket line at the General Motors Romulus Powertrain plant in Romulus, Mich. General Motors CEO Mary Barra joined negotiators at the bargaining table Tuesday, Oct. 15, an indication that a deal may be near to end a monthlong strike by members of the United Auto Workers union that has paralyzed the company’s factories. (AP Photo/Paul Sancya, File)

FILE - In this Jan. 30, 2010, file photo, Vice President Joe Biden, left, with his son Hunter, right, at the Duke Georgetown NCAA college basketball game in Washington. Since the early days of the United States, leading politicians have had to contend with awkward problems posed by their family members. Joe Biden is the latest prominent politician to navigate this tricky terrain. (AP Photo/Nick Wass, File)

FILE - In this Jan. 30, 2010, file photo, Vice President Joe Biden, left, with his son Hunter, right, at the Duke Georgetown NCAA college basketball game in Washington. Since the early days of the United States, leading politicians have had to contend with awkward problems posed by their family members. Joe Biden is the latest prominent politician to navigate this tricky terrain. (AP Photo/Nick Wass, File)

FILE - In this Jan. 30, 2010, file photo, Vice President Joe Biden, left, with his son Hunter, right, at the Duke Georgetown NCAA college basketball game in Washington. Since the early days of the United States, leading politicians have had to contend with awkward problems posed by their family members. Joe Biden is the latest prominent politician to navigate this tricky terrain. (AP Photo/Nick Wass, File)

FILE - In this Monday, April 29, 2019 file photo, Boeing Chief Executive Dennis Muilenburg speaks during a news conference after the company's annual shareholders meeting at the Field Museum in Chicago. Boeing has taken the chairman title away from CEO Dennis Muilenburg as the aircraft maker continues to struggle with fallout from two deadly plane crashes, Friday, Oct. 11, 2019. (AP Photo/Jim Young, Pool, File)

FILE - In this Tuesday, March 5, 2019 file photo, Thierry Bollore, Renault Chief Executive Officer, speaks during the presentation of the new Renault Clio as part of the press day at the '89th Geneva International Motor Show' in Geneva, Switzerland. French carmaker Renault has dismissed its chief executive officer, overhauling its leadership once again after the jailing of its previous chairman and CEO. The decision by the board on Friday Oct. 11, 2019, to dismiss Thierry Bollore was effective immediately. (Cyril Zingaro/Keystone via AP, File)