Coming soon: A Guide to Burning Bridges by Andy Barr.

Barr, a former Politico reporter who is now working as Communications Director for the Richard Carmona Senate campaign, has openly criticized his former employer in a seething, sarcastic tweet.A little background: In 2003 Cristina Beato was named Asst. Sec. of Health, but not without ensuing confirmation controversy. Barr is ragging on a story published today by John Bresnahan and Manu Raju. The story has Beato trashing Carmona. This is Barr’s turf and one he’s obviously protecting.

Politico’s oh so credible source couldn’t get confirmation because she “fabricated or inflated portions of her résumé” wapo.st/KDnDED

— Andy Barr (@AndyBarr34) May 21, 2012

Update and correction: Barr left his job working for the Arizona Democratic Party four months ago to work for the Carmona campaign. We’ve corrected the above to reflect this.