YOU SAID:

should anyone vote on this party if they are part of it of not?

INTO JAPANESE

彼らはそれの一部である場合、誰がこのパーティーに投票する必要がありますか？

BACK INTO ENGLISH

If they are part of it, who needs to vote for this party?

INTO JAPANESE

彼らがそれの一部であれば、誰がこのパーティーに投票する必要がありますか？

BACK INTO ENGLISH

If they are part of it, who needs to vote for this party?