I just look forward to Trump winning Iowa and all of the bragging/"sky is falling" takes it will inspire, with everyone completely forgetting that Rick Santorum and Mike Huckabee were the last two winners of the Iowa Caucus'.
Trump pretty much has the rest of the nation locked up. The real story will be the turnout in Iowa.
In 2012, Santorum had 29,839 votes, and Romney was a close second at 29,805 votes.
High turnout = bad news for the Democrats. I myself am curious to Trump's ability to bring in people who are not likely voters, or have not voted in an election ever, as most scientific polls are based on likely voters.
If Trump can bring in a new group of voters at a +10%-30% margin over his opponents he's not only for real, it will show just how popular he is.
Time will tell, but if Trump pulls in 1,000's of non-likley into the Republican tent, he's not only for real, he's going to beat anyone the Democrats nominate.