In the U.S., we experience what seems like a never-ending campaign season. Almost as soon as one election is over the race is on for the next one. The U.K. is different. This week, the starting gun fired on Britain's 2015 election campaigning season. Voters will go to the polls in just four weeks. NPR's Ari Shapiro reports from London.
ARI SHAPIRO, BYLINE: On Tuesday morning, Prime Minister David Cameron's black armored Jaguar rolled to Buckingham Palace. Then he returned to Number 10 Downing Street to make his opening pitch.