When Sinn FÃ in came to nominate its two ministers to the Executive Council , the party , like the SDLP and the Democratic Unionist Party ( DUP ) did not to include its leader among its ministers . When Sinn FÃ in came to nominate its two ministers to the Northern Ireland Executive , for tactical reasons the party , like the SDLP and the Democratic Unionist Party ( DUP ) , chose not to include its leader among its ministers .