Gas prices have soared nationwide. Mario Tama/Getty Images Gas prices are climbing rapidly, unsettling Americans' economic perceptions. The Consumer Sentiment Index, which gauges how people feel about the economy, hit a new low in March. Geopolitical tensions and inflationary pressures are heightening Americans' concerns over gas prices. Americans are feeling despondent about gas. It's a dour time for consumers — in April, the University of Michigan's Consumer Sentiment Index, which surveys...