AMSTERDAM (Reuters) - Eurosceptics Geert Wilders of the Netherlands and Marine Le Pen of France will discuss closer cooperation on Wednesday in a bid to capitalize on voter frustration with mainstream politics before 2014 European parliament elections. The two anti-euro, anti-immigration politicians have talked of joining forces for months to win a wider pan-European stage. Europe's nationalist parties have historically struggled to overcome differences and form long-lasting alliances. ...