Election Day has arrived in the United Kingdom. The majority Labour party is fighting furiously to keep control of parliament, Conservatives are confident they will return to power for the first time in 13 years and the upstart Liberal Democrats threaten to throw everything into chaos. So which party has the momentum? Why is the public so upset with Labour? Will any party win a majority or will it take a coalition to rule? We ask former British diplomat Jonathan Clark, now a senior fellow with the Carnegie Council.