Dems: McCain's Age Is "Fair Game"

I get the sense that John McCain' age is now fair game for Democrats.  Democrats feel that McCain's Palin pick has given them the green light to use phrases like "a heartbeat away" in their press releases and reactions. 

McCain's proximity to death and her proximity to him justify the attention that will be drawn to McCain's age, in this view.

Watch the number of press releases that mention McCain's birthday and/or contain "heartbeat"-type phrases in them.