Here's the still-beating heart of the rift between Texas Gov. Rick Perry and his predecessor, George W. Bush: When Bush was governor he refused to appoint Perry's brother-in-law to the Texas appeals court bench. With Perry now running for president, the spotlight is shining on the tense relationship between the two Texans and their allied camps.
In public, both Perry and Bush shrug off any friction.
"Between the Bushes and Rick Perry there is absolutely no rift at all," Perry recently told conservative radio show host Sean Hannity.
When Bush was asked in a separate interview about it, he mentioned Karl Rove, one of his most trusted advisers, and said: "Maybe with Karl. Not with my brother, with my dad, not with me at all. I admire him."
Despite all the niceties, Perry didn't hold back when asked during a recent Republican debate about Rove's comments that Perry's 2010 book "Fed Up!" contained such explosive language that it could be "toxic" in the general presidential election.