South Korean presidential election candidates, from left, Moon Jae-in of the Democratic Party of Korea, Hong Joon-pyo of the Liberty Korea Party, Yoo Seong-min of the Bareun Party, Sim Sang-jung of the Justice Party and Ahn Cheol-soo of the People's Party, wait for their televised debate for the upcoming May 9 presidential election in Seoul, South Korea, Tuesday, May 2, 2017. REUTERS/Ahn Young-joon/Pool