New poll show gas prices creating anxiety among Americans

(CNN) -- The number of Americans who said gasoline prices are the most important economic problem facing the country has more than tripled since December, according to a new poll.

The CNN/ORC International survey released Thursday, the same day President Barack Obama delivered a speech about gas prices, indicated oil companies received most of the blame for higher prices at the pump.

Seven in ten Americans said rising prices have caused hardship for them and their families, with nearly half saying the prices will rise to $5 a gallon some time this year.

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