Foreign-based members of Cambodia’s dissolved opposition party have launched a movement to demand the release of its detained leader and to call for free and fair elections and possibly protests. On September 2017, Police arrested Cambodia National Rescue Party (CNRP) leader Kem Sokha over allegations of treason, with Prime Minister Hun Sen accusing the opposition president of conspiring with the United States to oust his regime. Former CNRP leader Sam Rainsy and exiled Cambodian opposition leaders set up a new political movement.