Greeks today, citing national pride and sovereignty, voted overwhelmingly to reject a package of tax increases, government layoffs, and pension reductions demanded by wealthier eurozone nations in exchange for a new financial lifeline for the bankrupt country. The vote, which was running at 61.7 percent against with 82 percent of the precincts reporting, amounts to a stunning political victory for Prime Minister Alexis Tsipras. Mr. Tsipras' left-wing Syriza party rolled to victory in January elections, thanks to an electorate furious at five years of austerity measures that have slashed economic output and employment, and came with promises of a new way of doing business with the rest of Europe.