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 five dollars a gallon some time this year.

The current average price for a normal gallon of gas nationally stands at $3.921, according to the latest figures from AAA.

Obama addressed gas prices during a speech ahead of a procedural Senate vote expected Thursday on a bill to repeal tax subsidies for oil companies.

The president reiterated his support for rolling back tax breaks for the companies, something critics argue would only increase gas prices.

However, the political fallout from rising prices might be limited, according to the latest poll.

Most Americans blamed the oil companies, not the Obama administration, for the prices. Republicans in Congress received a similar level of blame to the White House. Fifty-five percent of those surveyed blamed the oil companies a great deal for the recent increase, while 24 percent said the same of Obama and 21 percent said the same of Congressional Republicans.

Foreign countries that produce oil also received more blame than American politicians of either party.

Twenty percent of all Americans said gas prices are the No. 1 economic issue currently facing the country; up from 6 percent of those surveyed who said the same in December, when gas prices were lower on average.