“You’re right, you’re right,” he said. “I’ll be honest with you: it was so subtle that personally, I didn’t notice it.”

Few people apparently did.

In a troubling sign for Democrats as they head into the midterm elections, their signature tax cut of the past two years, which decreased income taxes by up to $400 a year for individuals and $800 for married couples, has gone largely unnoticed.

In a New York Times/CBS News Poll last month, fewer than one in 10 respondents knew that the Obama administration had lowered taxes for most Americans. Half of those polled said they thought that their taxes had stayed the same, a third thought that their taxes had gone up, and about a tenth said they did not know. As Thom Tillis, a Republican state representative, put it as the dinner wound down here, “This was the tax cut that fell in the woods  nobody heard it.”

Actually, the tax cut was, by design, hard to notice. Faced with evidence that people were more likely to save than spend the tax rebate checks they received during the Bush administration, the Obama administration decided to take a different tack: it arranged for less tax money to be withheld from people’s paychecks.

They reasoned that people would be more likely to spend a small, recurring extra bit of money that they might not even notice, and that the quicker the money was spent, the faster it would cycle through the economy.