Turkish President Recep Tayyip Erdogan, a populist with increasingly authoritarian tendencies, is scheduled to take the oath of office and start his third presidential term Saturday following his latest election win. Erdogan, who has led Turkey as prime minister or president for 20 years, prevailed in a runoff race last weekend despite the country's ongoing economic crisis and his government's criticized response to a February earthquake that killed more than 50,000 people. Known as “reis,” or “the chief,” among his fans, the 69-year-old Erdogan already is the longest-serving leader in the Turkish republic’s history. His reelection to a five-year term that runs until 2028 extends his rule into a third decade, and he could possibly serve longer with the help of a friendly parliament.