I'm convinced that discussing the presidential race at this point in time is largely a waste of time. Nevertheless, I do it, mostly with fellow Democrats. The ones I know seem to be divided on the issue of Donald Trump. About half of them are afraid he'll get the Republican nomination and have a shot at winning the presidency. The other half of them are afraid he won't get the nomination and that it will go to someone who won't be as easy for the Democratic nominee to defeat.
That's always a conundrum for those who want their party to win: Do you want the opposition party to nominate someone who'd make a decent president in case they win? Or someone who wouldn't and therefore is more likely to lose? I'm not sure how I feel about this. I guess I don't trust the electorate to recognize that the worst guy is the worst guy.
In any case, this is for those who are worried about Trump getting the nomination. Larry Sabato, who has a pretty good track record of forecasting elections, calls Trump "The Un-Nominatable Frontrunner." You can read the article, see why and decide if you want to believe him. Sabato thinks the race is now down to Bush, Rubio and Walker.