??? In the case of Fred Thompson, your assertion is at least so far, provably false.
Are you thinking that Fred would endorse McCain because they were friends? Or because Fred did initially sign the McCain/Feingold legislation? It is my understanding that once Fred was in the race he answered that concern. He said the legislation was to his liking so he supported it. But it was a mistake because things were added to the legislation that he did not agree with. I do believe that although Fred and McCain were friends, that Romney’s stands on most issues is in line with Fred’s. The amnesty issue being the main one. I could be wrong, but still believe with those who are left, that Fred would endorse Romney if he endorses anyone. Looks like he will not endorse and will just support the nominee in the end.
Here's hoping for a brokered convention where Fred becomes the alternative.
A conservative can dream can't he?