noun
leadership election; party leader election
Commonly used for elections to choose the leader of a political party or organization, such as a party president or representative.
自民党の代表選は来月行われる。
The LDP leadership election will be held next month.
代表選の結果、新しい党首が決まった。
As a result of the leadership election, a new party leader was decided.
総裁選 specifically refers to the election of a party president (総裁), often used for the LDP. 代表選 is broader and can apply to other organizations.
Compound of 代表 (representative) and 選 (election).