WASHINGTON — The Senate cracked Republican orthodoxy on taxes and undermined the once-impregnable political support for corn subsidies in an overwhelming vote Thursday to kill tax credits and tariffs for corn ethanol for the first time in more than three decades.

A combination of record corn prices, which are damaging poultry, dairy, cattle and hog farmers, and rising alarm over the chronic $1.5 trillion deficit forced lawmakers to take a second look at how the nation spends its money.

California Sen. Dianne Feinstein, a Democrat, and Oklahoma Sen. Tom Coburn, a Republican, joined forces on an amendment to eliminate a 43-cent-a-gallon tax credit for corn ethanol that is paid to oil refiners and a 54-cent-a-gallon tariff that blocks more energy-efficient sugar ethanol, mainly from Brazil.

Gas mandate remains

An additional federal mandate that refiners add a 10 percent blend of ethanol to gasoline would remain. The amendment passed 73-27.

‘If we’re going to carry out the mandate of a prudent government, we’ve got to start making changes,’ Feinstein said, predicting more cuts ahead. The ethanol subsidy has cost $22.6 billion since 2005.

Ethanol tax credits are a classic ‘tax expenditure,’ a tax break that is equivalent to a cash payment because it awards a direct financial […]

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