From the Washington Post:
In spite of his insistence that he will not run, Mitt Romney is being courted this week by a leading conservative commentator to reconsider and jump into the volatile 2016 presidential race as an independent candidate.
William Kristol, the longtime editor of the Weekly Standard magazine and a leading voice on the right, met privately with the 2012 nominee on Thursday afternoon to discuss the possibility of launching an independent bid, potentially with Romney as its standard-bearer.
I’m not so sure Romney couldn’t win, given the number of disaffected Democrats and Republicans, though of course it’s unlikely. And, that he was a previous GOP nominee would give many prominent Republicans an excuse to back him over Trump.
I am pretty sure Romney would prevent Trump from winning, siphoning off more votes from the GOP nominee than the Democrat. Though if Romney won a few states and nobody received a majority in the Electoral College, the House of Representatives decides, and it would likely support the GOP nominee. I think.