Just because someone calls themselves a Democrat (registered), doesn’t mean that is how they vote.
With these ad buys, Graham is essentially endcrsing Romney. He will likely vote for Romney.
Your point about Graham makes no sense....but you likely know that.
From 2005:
http://www.renewamerica.com/columns/tabor/050629
http://www.covenantnews.com/blog/archives/013273.html
http://www.bereanpublishers.com/Deception_in_the_Church/Dr.%20Billy%20Graham%20Tragedy.htm
From today:
http://en.wikipedia.org/wiki/Billy_graham#Politics