AN UNRIVALED EXPERT…. John McCain, via Twitter, around 3 p.m. yesterday:

We just learned of a third “undisclosed” nuclear facility in Iran…how many more are there?

John McCain, via Twitter, about a half-hour later:

opps – I meant two undisclosed nuclear sites NOT three…

Glenn Thrush added, “By ‘opps’ he meant ‘oops,’ I presume.”

Remind me again why the producers of the Sunday morning shows consider McCain such an expert on foreign policy and national security?

Steve Benen

Follow Steve on Twitter @stevebenen. Steve Benen is a producer at MSNBC's The Rachel Maddow Show. He was the principal contributor to the Washington Monthly's Political Animal blog from August 2008 until January 2012.