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How Super Tuesday could rock the stock market

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Super Tuesday's market impact

If either Donald Trump or Hillary Clinton looks vulnerable to a challenge after Super Tuesday polling, the upset could show up in the stock market.

"The worst-case scenario is it continues to be a draw on the Democratic side, and nobody else is gaining momentum on the Republican side," said Art Hogan, chief market strategist at Wunderlich Securities.

Analysts say Wall Street expectations are high that Trump will sweep the Republican contests in 11 states, but if any of his more-traditional GOP rivals makes a stronger-than-expected showing Tuesday, the market could get a lift. On the other hand, if front-runner Clinton looks weaker than expected against Vermont Sen. Bernie Sanders, a self-proclaimed democratic socialist, that could be a negative for stocks.