Cory Booker actually said...
Congolese president, Joseph Kabila, has refused to step down since the end of his constitutionally mandated two term limit in 2016 creating instability and a humanitarian crisis in which thousands of civilians have been killed and 4.5 million have been displaced.
Context
Booker discusses the political instability in the DRC due to Kabila's refusal to leave office.
01/02/2018