Leon Cooperman, chairman and CEO of Omega Advisors, speaks during the Sohn Investment Conference in New York May 4, 2015. REUTERS/Brendan McDermid

A Pacific Investment Management Co (PIMCO) sign is shown in Newport Beach, California August 4, 2015. REUTERS/Mike Blake

House Oversight and Government Reform Committee ranking member Elijah Cummings (D-MD) holds an EpiPen during the committee hearing on the Rising Price of EpiPens at the Capitol in Washington, U.S., September 21, 2016. REUTERS/Yuri Gripas

The Boeing logo is seen at their headquarters in Chicago, in this April 24, 2013 file photo. REUTERS/Jim Young/File Photo

Republican presidential nominee Donald Trump delivers remarks as he rallies with supporters in Toledo, Ohio, U.S. September 21, 2016. REUTERS/Jonathan Ernst

Mylan NL CEO Heather Bresch testifies before a House Oversight and Government Reform Committee hearing on the Rising Price of EpiPens at the Capitol in Washington, U.S., September 21, 2016. REUTERS/Yuri Gripas

Mylan NL CEO Heather Bresch holds EpiPens during a House Oversight and Government Reform Committee hearing on the Rising Price of EpiPens at the Capitol in Washington, U.S., September 21, 2016. REUTERS/Yuri Gripas

Mylan NL CEO Heather Bresch holds EpiPens during a House Oversight and Government Reform Committee hearing on the Rising Price of EpiPens at the Capitol in Washington, U.S., September 21, 2016. REUTERS/Yuri Gripas