Speaking of insanity.

(The Hill) — Democratic National Committee Chairwoman Debbie Wassserman Schultz slammed Republican presidential candidate Rick Perry’s tax plan, saying his flat tax proposal would benefit the wealthiest Americans at the expense of the middle class and increase the deficit.

“My reaction to Rick Perry’s new/old plan is that the definition of insanity is doing the same thing over and over again and expecting a different result,” said Wasserman Schultz on MSNBC Tuesday.

Perry, the Texas governor, laid out a sweeping overhaul to the nation’s tax code, entitlements and way of budgeting Tuesday. He called for an optional 20 percent flat tax, a privatized option for Social Security and a hike in the eligibility age for Social Security and Medicare.

“This is not a new idea, this is not something that’s proposed for the first time. A flat tax has been introduced in the past and it’s been rejected because it blows a hole in the deficit,” she added.