党内

1. Origins, structure, and basic meaning

• Structure: Spelling: 党内. Reading: とうない. Core meaning: within the party; intra-party.
• Basic usage: Representative examples: 党内で新しい方針について意見が分かれた / 代表は党内の議論を経て提案をまとめた.

2. Common pitfalls and similar expressions

• Scope inside a party
  • 党内で marks the party as the setting or scope of discussion, while 党内の議論 means debate conducted within the party. It is not limited to being physically inside a building.