More than 150 million Indonesians will head to the polls on Wednesday, June 27, to elect 17 governors, 39 mayors and 115 regents. Indonesia’s most populous province, West Java, is set to go the polls in what’s shaping up as a test of President Joko Widodo’s popularity and a potential springboard for his rivals ahead of next year’s presidential election. While Jokowi’s popularity has soared across the country, West Java was the scene of one of his heaviest defeats during the 2014 election to now opposition leader Prabowo Subianto, Bloomberg reports. Ahead of local elections across much of the country on Wednesday, the anti-Widodo sentiment has crystallized into a movement called “#GantiPresiden2019” or “Change the president in 2019”, Reuters reports. The movement’s founder, Mardani Ali Sera, says the majority of those affiliated with his movement are from Islamic parties and the groups that opposed Jakarta’s Christian governor, who is currently jailed for blasphemy.