The US Republican race is dominated by ignorance, lies and scandals. The current crop of candidates have shown such a basic lack of knowledge that they make George W. Bush look like Einstein. The Grand Old Party is ruining the entire country's reputation.

Africa is a country. In Libya, the Taliban reigns. Muslims are terrorists; most immigrants are criminal; all Occupy protesters are dirty. And women who feel sexually harassed — well, they shouldn't make such a big deal about it.

Welcome to the wonderful world of the US Republicans. Or rather, to the twisted world of what they call their presidential campaigns. For months now, they've been traipsing around the country with their traveling circus, from one debate to the next, one scandal to another, putting themselves forward for what's still the most powerful job in the world.

As it turns out, there are no limits to how far they will stoop...

Will Medicare premiums go up nearly 2 1/2 times over the next two years in order to pay for the health-care legislation signed by President Obama last year? Well, no, they won't. But you might think an increase is coming if you read a chain e-mail that has spread across the country in the past few months. "Send this to all seniors that you know," it says. "So they will know who's throwing them under the bus."

Will Americans be subjected to international gun-control laws under a new U.N. treaty signed by Hillary Rodham Clinton? Is the president honoring Jane Fonda as one of the "women of the century"? Was suspected Fort Hood shooter Maj. Nidal Hasan an adviserto the Obama administration?

Like the Medicare story, these claims are demonstrably false, too. Nevertheless, they are popular on the thriving underground e-mail circuit, a carnival of nonsense whose star attractions have included the canard that Obama is a secret Muslim and variations on the "birther" claims about his origins.

Grass-roots whisper campaigns such as these predate the invention of the "send" button, of course. No one needed a Facebook page or an e-mail account to spread the word about Thomas Jefferson's secret love child or Grover Cleveland's out-of-wedlock offspring (both won elections despite the stories, which in Jefferson's case were very likely true).

But it has become a truism that in their modern, Internet-driven form, these persistent narratives spread far faster and run deeper than ever. And they share an unexpected trait: Most of the time, Democrats (or liberals) are the ones under attack...