[artoghrul]

The two-party system is not really a coalition system, is it? For one, there is no way for minority factions within parties to exert effective control over the other factions, no? A prime example being how the centrist majority of the Democratic party crushed the democratic socialist faction.

[pjc50]

Conversely, the Tea Party faction of the Republicans gained control more or less entirely from the outside, due to media support.

[philwelch]

The process for doing this is primary elections, which you can participate in if you want to!

[mattpallissard]

We call them caucuses.