When the right makes a mistake, pounce...

When the left does it, it's just an honest mistake.

Here we can see how both sides are treated equally when they make mistakes

Mark Halperin, Co-writer of Game Change – No found donations; however, in October 2004 Halperin sent to ABC News staff a memo about coverage of the U.S. presidential election directing them not to “reflexively and artificially hold both sides ‘equally’ accountable”* and that both John Kerry and George W. Bush used “distortion” in their campaign, but that Kerry’s distortions were not “central to his efforts to win.”

*my emphasis