Whoever wins, will get to choose who succeeds Jean-Claude Juncker as President of the European Commission, if they're still the biggest block in the European Parliament after next May's election.
MEPs Manfred Weber and Alexander Stubb are going head-to-head at the European People's Party (EPP) conference in Helsinki.
The two men are in the race to become the EPP's lead candidate for the presidency of the European Commission.
German politician Weber is the current leader of the EPP in the European Parliament, while Alexander Stubb is the former Finnish prime minister and a current vice president of the European Investment Bank.
_Watch the video above to see what Raw Politics’ panel of guests think about the candidates. _