Communist.
YES. The Vietnamese government is very stable.
Vietnam has a communist government.
Presuming you mean the government supported by the US: The Republic of South Vietnam.
Government of Free Vietnam was created on 1995-04-30.
communism
Provisional Revolutionary Government of the Republic of South Vietnam ended in 1976.
Which government?
Which Korea and which Vietnam? Today's Vietnam or the old North and South Vietnam?
Feared that Vietnam would vote for a Communist government.
communist
Because Vietnam's government was communist
Before reunification, Vietnam was divided into North Vietnam and South Vietnam. North Vietnam had a Sino-Soviet backed Communist government, while South Vietnam had a Western-backed Democratic government (at least in principle). Prior to the division of North and South Vietnam, it was subject to a French colonial government, whose control of the region was interrupted during WWII, when a Japanese occupational government controlled the region.