Last week Palin dismissed the Bush family as “blue bloods” but Meghan McCain, who admits she's one, says the media star is a playing a dangerous game that will tear apart the Republican Party. Welcome to the echo chamber! This week's (or possibly month's) latest rhetorical talking point is "blue bloods." And guess what? In the way it has been used I am probably considered one and so is the entire Bush family, not to mention countless others. And who else would deliver such a catchy media talking point than, yes, Sarah Palin. The reference to "blue bloods" was made...