Sixty percent (60%) of U.S. voters now oppose the passage of a second economic stimulus plan this year, a five-point increase in opposition since the issue was first raised in March.

A new Rasmussen Reports national telephone survey shows that just 27% of voters favor a new stimulus plan, unchanged from the earlier findings. Thirteen percent (13%) are not sure.

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Eighty-one percent (81%) of Republicans and two-thirds of voters not affiliated with either major political party (66%) are against passage of a second stimulus plan. Democrats are much more evenly divided, but a plurality of those in Barack Obama’s party (45%) like the idea.

Similarly, a sizable majority of conservatives (82%) oppose a second plan, but a plurality of liberals (45%) favor it.

While voters nationwide strongly oppose another stimulus plan this year, 57% of the Political Class think it’s a good idea.

That helps to explain why 68% of voters believe it is at least somewhat likely that President Obama and Congress will try to pass another economic stimulus plan this year. One-out-of-three voters (34%) say it is very likely to happen.

Vice President Joseph Biden in a television interview on Sunday said the Obama administration misjudged the poor state of the economy and undersized the first economic stimulus plan, which emerged from Congress with a $787-billion price tag. But Biden said the administration is not in favor of going ahead with a second stimulus plan right now, despite a 9.5 percent unemployment rate.

Public opposition to a second stimulus plan is explained in part by the mixed feelings voters have about the first plan: 31% say it has helped the economy and 30% say it has hurt.

Forty-five percent (45%) of Americans say the rest of the new government spending authorized in the first stimulus plan should now be canceled.

Seventy-six percent (76%) of Americans say it is at least somewhat likely that a large amount of money in the first stimulus plan will be wasted due to inadequate government oversight.

One reason for this division of opinion is that Democrats and Republicans see a very different economy. Democrats are evenly divided as to whether the economy is getting better or worse while Republicans and unaffiliated believe it is getting worse.

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