Philippine President Rodrigo Duterte has threatened to jail critics if they try to impeach him, as he faces accusations of defending Beijing after a boat crash in the disputed South China Sea. The issue has flared up since a Chinese fishing trawler hit and sank a Filipino boat on June 9 near Reed Bank, an area that is within Manila’s territory but which is also claimed by Beijing. After a string of small street protests, as well as criticism from opposition politicians and former officials, Duterte lashed out while talking to reporters late Thursday. “Impeach me? I will arrest all of them. I dare you to do it,” Duterte said. “I tell these stupid people, I said I deal with reality,” he added. Duterte has tried to downplay the case, calling it an “accident” and accepting Beijing’s offer to conduct a joint investigation.