A deeply unpopular Republican president, high gas prices, a seemingly endless war against Iran that has little popular support. Many factors in the current U.S. political climate should be favorable to Democrats. Instead, the Democratic Party is left with much hand-wringing ahead of November's midterm elections and growing calls for the party's executive leader to step down. One of the people voicing those calls is David Hogg, a gun violence prevention advocate who previously served as vice chair of the Democratic National Committee. He now runs Leaders We Deserve, a group to elect young progressive leaders to Congress and state...