Cindy McCain should be applauded for her efforts, but unfortunately I don't think they will make any difference to her bigoted husband, Republican Senator John McCain.
It was Sen. McCain who led the years-long fight to force gays out of the military, giving speech after speech about how the entire armed forces would be doomed if those dirty gays were allowed to mix in with the "normal" soldiers.
The Republicans lost that battle, of course, and have since been proven dead wrong on yet another issue where they claimed the sky was falling.
The military has successfully integrated openly gay people with little to no incident.
But McCain still believes that gay people are unfit for service, and has never apologized for his bigotry. Someone whose heart is that twisted with hate will not change his mind based on a signature on a petition.