Samuel Joseph Wurzelbacher, whose question to Barack Obama on the 2008 presidential campaign pushed him into the national spotlight, died Sunday, his wife confirmed to NBC News. He had pancreatic cancer and was 49. Wurzelbacher became better known as "Joe the Plumber" after posing a question to then-candidate Obama regarding his tax policies and the potential negative impact on small businesses. He quickly became synonymous with the quintessential "everyman," which the Republican Party latched onto in their presidential campaign at the time. Last year, Wurzelbacher was diagnosed with Stage 3 pancreatic cancer following a few months of stomach issues, according...