Key races to watch as 400 million vote in European elections

A man votes at a polling station during the European Parliament and the local elections in Budapest, Hungary (Zoltan Balogh/MTI/AP)

Nearly 400 million European Union citizens have been going to polls this week to elect members of the European Parliament, or MEPs, in one of the biggest global democratic events.

Voters are casting ballots in two dozen languages in 27 countries with scores of different campaign issues.