The primary goal of a party coalition is to secure a majority in the legislature, thereby enabling the coalition to control the legislative agenda and pass desired policies.

Electoral necessity, such as the need to secure a majority in the legislature or to prevent another party from gaining power, is often the primary driver behind the formation of party coalitions.

Managing power-sharing arrangements, including the allocation of cabinet positions, legislative committee assignments, and other resources, is a major challenge for party coalitions.

In multi-party systems, the minimum winning coalition is the most common type of party coalition, as it includes only the parties necessary to secure a majority in the legislature.

A party coalition's failure to maintain unity can lead to loss of public support, government instability, and even early elections, as the coalition may be unable to pass legislation or effectively govern.

Germany has a long history of successful party coalitions, with various combinations of parties forming governments over the years.

A rainbow coalition is a party coalition that includes parties from across the political spectrum, often with diverse ideologies and policy positions.

Personal rivalries among party leaders can hinder the success of a party coalition, as they can lead to conflicts, disagreements, and a lack of cooperation.

Party coalitions can offer increased representation of minority groups, enhanced policy-making capabilities, and greater stability and longevity of government.

The United States has a political system that explicitly prohibits party coalitions at the national level, as the Constitution establishes a two-party system.

A negative coalition is a party coalition that is formed to oppose a common enemy, often without a shared ideology or policy platform.

Changes in the political landscape, ideological disagreements, and power struggles can all lead to the dissolution of a party coalition.

Party coalitions can lead to increased complexity of policy-making, potential for instability and conflict, and reduced accountability of individual parties.

Germany has a political system that encourages the formation of party coalitions, as the electoral system makes it difficult for a single party to gain a majority in the legislature.

An issue-based coalition is a party coalition that is formed to promote a specific policy or issue, often without a shared ideology or broader policy platform.