Democrats think Americans are stupid, the executive director of House Republicans' campaign committee alleged Tuesday.

National Republican Congressional Committee (NRCC) Guy Harrison charged congressional Democrats with "turning their backs" on their constituents in an email to supporters soliciting donations.

"Did you know...Democrats think you're stupid," Harrison wrote to open his email. "Why else do Democrats think you are unable to choose what's best for you?"

The top NRCC official cited Rep. Eric Massa's (D-N.Y.) words to a liberal group about voting against the interests of his district on healthcare as evidence.

"If you want your voice heard in Congress you must retire Speaker Pelosi, Eric Massa and every other Democrat that puts your interests and welfare second," he said. "The only way to stop government-run healthcare is to run Democrats out of government."