Four years later and what a difference this makes in the cycle of America’s presidential election.

Four years ago enough Americans decided to vote into the White House a man with a slim resume, no executive experience in the private sector or government, and a history of association with individuals of dubious public record.

The recent edition of Newsweek ­— with Republicans gathered in Tampa, Fla., for their national convention to nominate Mitt Romney as their candidate for president and Paul Ryan as his running mate — has on its cover President Obama and the feature essay by Harvard historian Niall Ferguson titled “Hit the Road, Barack.”

The surprise was not Ferguson’s razor-sharp exposure of President Obama’s failed record, but that a magazine known for its ultra left-liberal editorial slant would run such a cover story. Even more surprising was how quickly this edition of Newsweek sold out.

I could not find a copy driving back from a family vacation in any of my several stops at newsstands and bookstores between Orlando, Fla., and Niagara Falls, NY. It could well be an early intimation of the ground shifting under the feet of the present occupant of the White House.

There is buyer’s remorse among a wide swath of Americans for having bought into the “hope and change” baloney of candidate Obama in 2008. The obvious question is whether enough Americans, especially those registered as independent, will vote for the Romney-Ryan ticket in less than 10 weeks and make Obama a one-term president like Jimmy Carter.

Americans searching for answers as to how the country got snookered into voting for Obama can pick up an impressive list of books examining his story that went mostly unexamined by the mainstream media in 2008. This body of work will grow over time as sentiments surrounding the first black president in America’s history recede.

In the Newsweek essay Ferguson writes, “the question confronting the country nearly four years later is . . . whether [the president] has delivered on his promises. And the sad truth is that he has not.”

Ferguson has been roundly attacked by Democrats and their partisans in the media and academia for his assessment of Obama presidency. But the ferocity of this attack also reveals how nervous Democrats and their friends are as Americans review Obama’s dismal economic record in the White House.

In 2008 Obama was shielded by the liberal-left media. During the 2008 primary the late Geraldine Ferraro — a life-long Democrat, a congresswoman from New York and the first woman nominated as vice-presidential candidate for a major party in the 1984 election — spoke out in frustration.

Ferraro said, “If Obama was a white man, he would not be in this position. And if he was a woman of any colour, he would not be in this position. He happens to be very lucky to be who he is. And the country is caught up in the concept.”

In 2012 Obama has a record from which he cannot run despite the same media’s effort to distract the public and smear his opponents. The concept Ferraro referred to has gone stale, and likely enough Americans want to correct their mistake of four years ago.