Pahor, a veteran politician known for his frequent use of social media, led by a large margin after the first round of voting on Oct. 22. But his runoff opponent, Marjan Sarec, has since narrowed the gap and the latest polls predict a close race Sunday.
The president in Slovenia holds no executive powers but they propose a prime minister and their opinion on important issues holds weight.
Slovenia, a country of 2 million people in Central Europe, is known for its mountains and lakes. It is the birthplace of U.S. first lady Melania Trump.