Is the ouster of a legislative component of the electoral tribunal on ground of breach of party discipline or betrayal of party interest be a political issue?

SEC.17

The senate and the house of representative shall each have electoral tribunals which shall be the sole judge of all contests relating to the election returns and qualification of their respective members. Each electoral tribunal shall be composed of nine members three of whom shall be justices of the supreme court to be designated by the chief justice and he remaining six shall be members of senate or the house of representatives as the case may be who shall be chosen on the political parties and the parties or organization registered under the party-list system represented therein. The senior justice in the electoral tribunal shall be its chairman.