IN-DEPTH: In Run-Up to Key Turkish Elections, Relations With Moscow Take Center Stage

Supporters of the Republican People's Party, or CHP, wave Turkish flags during a "Republic and Democracy Rally" at Taksim square in central Istanbul, on July 24, 2016. Petros Karadjias/AP Photo

NATO member Turkey has walked a fine line between the West and Vladimir Putin’s Russia under President Recep Tayyip Erdogan and his Islamist-leaning Justice and Development Party (AKP).

But that may change after May 14, when Turkey holds crucial elections that could spell the end of the party’s two decades in power.