Who wins for best song? (Left to right: Paul Sancya, Richard Ellis, Charles Dharapak)

If fitness for the presidency were rated solely on singing skills, who would dance their way into the White House? We turned to The Post’s pop music critic Chris Richards to find out.

Romney sang the patriotic tune at The Villages, a retirement community, and supporters joined in to sing along. “I love this country,” he said after the verse concluded. “I love its beauty.”

Richards on Romney: “There isn’t much finesse to his delivery, but at least he’s hitting the notes with confidence — even that high ‘mer’ of ‘America.’ He takes the bronze.”

Obama gave a rendition of the Rev. Al Green’s “Let’s Stay Together” at a fundraiser last week. To Green, who was in the audience, Obama said, “Don't worry, Rev, I cannot sing like you. I just wanted to show my appreciation.”

Richards on Obama: “[His] recent Al Green nod was promising, but too short.”

As for Cain, he was caught singing John Lennon’s slightly tweaked tune at a Godfather’s Pizza event in 1991, but the video surfaced during his run as a GOP candidate. Even two decades later, the song holds up.

Richards on Cain: “That leaves Herman ‘Imagine There’s No Pizza’ Cain the singing candidate to beat.”

Correction: A previous version of this post used an incorrect title for the song “Let’s Stay Together.”