proper forms of address for current and former officials....
There probably aren't many of us around here who are concerned about such things as the proper forms of formal reference for current and former office holders and other government officials, but I'm an old school southern boy in some respects, and I've always been disinclined to use casual references, mostly as a sign of respect. I was raised that way, Ma'am.
So I looked it up. Here: http://www.formsofaddress.info/former.html
Senator Clinton is not entitled to be referred to as Secretary Clinton, nor is the Honorable Mr. O'Malley entitled to being addressed as either Governor or Mayor O'Malley (but he might still be entitled to Councilman, since there are more than one at a time). In both cases, an office holder is entitled to be addressed as the office only during the time when they hold the office. After they leave that office, the title passes to someone else, and they revert to the highest last rank or office they held which is not unique to one single holder. Since there is only one Secretary of State at a time, Sen. Clinton is not entitled to that form of address any longer. However, there are many senators rather than just one at a time, so Sen. Clinton is the office to which her title reverts. She is also always entitled to being referred to as Honorable (once an Honorable, always an Honorable). Likewise, Dr. Condoleeza Rice has now reverted to Doctor (on edit: she would also be entitled to being called by her academic rank, i.e. Professor Rice). Neither Mr. Bill Clinton nor Mr. George Bush revert to any former office or rank. General Dwight Eisenhower reverted to his military rank.
Senator Sanders is a sitting senator, so that's that. I'll admit that I prefer Sen. Sanders to Bernie, and Sen. Clinton to Hillary. That's how I roll.
Mr. Mike Huckabee seems to be generally referred to as Governor Huckabee, but he is not entitled to it. The litmus test for the correct form of address is to ask whether it would ALWAYS be appropriate to address a former office holder by their title of office. If someone else occupies the post, then it would not be appropriate to address Mr. Huckabee as Governor when in the presence of the current actual governor of Arkansas, so he's not entitled to the honorific.
As far as I can tell, Senator Santorum is the correct form of address for a frothy mix of fecal matter and lubricant.
= new reply since forum marked as read
Senator Santorum is 
how one addresses the person, santorum is the name for the frothy mix.
Always getting my plain and proper nouns mixed up. 
Damn! 
