One-party state
In some countries which have this system, methods are used to suppress other parties, without actually banning them. In some cases state power is used directly and indirectly to prevent smaller parties getting more votes. This can include electoral fraud, gerrymandering or court decisions (which are controlled by the government). In many cases, opposition leaders and other figures are prevented from using the mass media at election time, and also they often are threatened, harassed, jailed and even killed. In other cases, apart from the government candidates, only candidates from smaller allied parties and "independent" candidates who are closely allied to the dominant ruling party, get an overwhelming advantage.