In a whispering campaign not ready to go public, some senior Republicans are so anxious about the state of the GOP race they are actually considering the unheard of: a scenario that would lead to another candidate entering the Republican primary race, and potentially an open convention.They are not unhappy enough, however, to go on the record calling for another candidate to enter the fray. In fact, when pressed, many Republicans say the chatter about another candidate is inevitable in this long and inconclusive primary process. They also say it's just not likely to happen.http://politicalticker.blogs.cnn.com...n-b/?hpt=hp_t2