Britain Football Soccer - Leicester City v Chelsea - EFL Cup Third Round - King Power Stadium - 20/9/16 Murals of Leicester City's Marc Albrighton, Robert Huth, Christian Fuchs, Danny Simpson and Chelsea's N'Golo Kante outside the ground before the match Reuters / Darren Staples Livepic

Democratic presidential candidates Senator Barack Obama (D-IL) (L) and Senator Hillary Rodham Clinton (D-NY) wait before the South Carolina Democratic party's presidential candidates debate at South Carolina State University in Orangeburg, South Carolina, U.S., April 26, 2007. REUTERS/Jim Bourg/File Photo

Republican U.S. presidential candidates Marco Rubio (L) and Donald Trump speak simultaneously as they discuss an issue during the debate sponsored by CNN for the 2016 Republican U.S. presidential candidates in Houston, Texas, U.S., February 25, 2016. REUTERS/Mike Stone/File Photo

Republican U.S. presidential candidate Donald Trump remains standing at the front of the stage as rivals Marco Rubio (L), Ted Cruz (2nd R) and John Kasich (R) head to their podiums at the start of the U.S. Republican presidential candidates debate in Detroit, Michigan, U.S., March 3, 2016. REUTERS/Jim Young/File Photo

Republican U.S. presidential candidate Donald Trump shows off the size of his hands as rivals Marco Rubio (L), Ted Cruz (2nd R) and John Kasich (R) look on at the start of the U.S. Republican presidential candidates debate in Detroit, Michigan, U.S., March 3, 2016. REUTERS/Jim Young/File Photo

Democratic U.S. presidential candidate Hillary Clinton reacts as rival candidate Senator Bernie Sanders (R) tries to hand her a piece of paper during a Democratic presidential candidates debate at the Brooklyn Navy Yard in New York, U.S., April 14, 2016. REUTERS/Lucas Jackson/File Photo

Republican presidential nominee and former Massachusetts Governor Mitt Romney talks to senior advisors Peter Flaherty (L), Beth Myers (2nd L) and Ed Gillespie (R), ahead of his first debate with U.S. President Barack Obama while flying on his campaign plane enroute to Denver, Colorado, U.S., October 1, 2012. REUTERS/Brian Snyder/File Photo

Democratic presidential candidate U.S. Senator Hillary Rodham Clinton (D-NY) listens as U.S. Senator Barack Obama (D-IL) makes a point during a debate at Saint Anselm College in Manchester, New Hampshire, U.S., June 3, 2007. REUTERS/Brian Snyder/File Photo