The Twitterverse briefly lit up, prompting a correction from Power, which still left critics scratching their heads. It read, “Correction: @DanielPearlFNDN’s work is a reminder that individual accountability + reconciliation are required to break cycles of violence.”

Also this week, Donna Brazile, the Democratic National Committee’s vice chairwoman, tweeted out this embarrassing blunder in advance of Arizona Governor Jan Brewer’s veto of a controversial anti-gay rights bill: “Dear Arizona Republicans: Just so you know — you’ve already lost this argument 50 years ago –You don’t get to decide who sits at the lunch counter.”

The tweet was accompanied by a grainy old photo of African-Americans seated at a segregated lunch counter.The tweet garnered no reaction until Instapundit’s Glenn Reynolds saw it, and promptly tweeted that it was “The Lie of the Year.” Brazile apparently forgot that segregation proliferated in the South under Democratic Party rule.

In each of the above cases, the offenders walked away virtually unscathed. Some analysts say when Republicans commit similar offenses, their careers are almost always damaged, sometimes beyond repair.