Advisers to President Barack Obama are scripting a Democratic National Convention featuring several Republicans in a prime-time appeal to independents — and planning a blistering portrayal of Mitt Romney as a heartless aristocrat who “would devastate the American middle class,” Democratic sources tell POLITICO…

The most innovative — and harshest — element of the preliminary program is a nightly “social contrast” in which two people describe their personal experience with a hot-button issue — one person lauding the president’s actions, the other taking Romney to task. “Each paired-testimonial should have an ‘unexpected’ participant,” the documents say…

Convention planners are considering featuring a centrist Republican leader on at least two of the three nights. Nightly remotes from swing states may include a CEO or “major Republican.” On Wednesday night, a “notable GOP woman” is among the possible participants. And on the final night, Democrats may include a Republican leader — someone like former Sens. John Warner or Chuck Hagel — or a GOP woman.

“This segment would speak directly to independents, noting we are all ‘Americans first,’ ” the documents say. “Depending on the speaker’s background, the President’s military accomplishments might be highlighted.”