There are several reasons why, in some systems, two major parties dominate the political landscape.

The party would dominate Ontario politics for the next four decades.

Democratic and Republican parties have dominated the American political scene for close to two centuries.

The party dominated the council for most of its existence, gaining a majority in 1976 which they held until 1995.

As a result, the party dominated the parliament, holding 238 of the 301 seats.

He could not let the reactionary party dominate this meeting.

The judiciary committee has for years been so constituted that no political party dominates its membership.

Douglas was active in Democratic politics at a time when his party dominated most of his native state.

Where a single political party dominates, other voices grow silent.

The party that stays in the middle dominates American politics.