Ontario has traditionally operated under a three-party system.

This political organization is the outcome of a merger of two parties; the state previously had a three-party political system.

That the Conservative candidate for governor nearly overtook the Republican does not necessarily mean there is now a three-party system.

The 3D swingometer is used to illustrate the shift in election results from the previous election in a three-party system.

Leiter considers himself a Republican, but he has some liberal leanings and likes to tout the benefit of a three-party system.

Since 1945, the evolution of a stable three-party system has tended to negate each of the above features so that, broadly speaking, elections are more comparable.

I think it has much to do with the three-party system.

In the 2003 election, the NDP were re-elected with 35 seats and almost 50% of the popular vote, an impressive result in a three-party system.

Provinces west of Quebec have, for most of the 20th and 21st centuries, had a three-party system, though the identity of these parties may have changed over time.

New political reforms were announced in April 1990, to include the introduction of a three-party system after a one-year transitional period.