President Obama offered an earthy rural metaphor to blast Mitt Romney last night in Iowa, saying the Republican candidate offered voters “a cowpie of distortion” in a recent speech.

“I don’t know whose record he twisted the most,” Obama said. “Mine or his.”

Romney aides said Obama is attacking their candidate in order to cover up his own failures.

“A president who broke his promise to cut the deficit in half by the end of his first term has no standing when it comes to fiscal responsibility,” said Romney spokesman Ryan Williams.