“But those familiar with Romney’s thinking as he’s been contemplating a run and over the years say that he has held a jaundiced view of the former Florida governor dating all the way back to his handling of the Terri Schiavo case, and has come to see Bush as a non-entity in the 2016 nomination contest. Romney is said to see Bush as a small-time businessman whose financial transactions would nonetheless be fodder for the Democrats and as terminally weighed down with voters across the board based on his family name. Romney also doesn’t think much of Bush’s political skills (a view mocked by Bush’s camp, who say Romney is nowhere near Bush’s league as a campaigner). Romney also considers Bush the national Republican figure who was the least helpful to him during his last run for the White House, a position that has darkened Ann Romney’s view of Bush as well.
“Romney and Christie became friends in the last cycle, but Romney nevertheless has dismissed his pal as a non-factor. Thanks to the 2012 veep vetting process, Romney became intimately familiar with some of the less publicized controversies from the New Jersey governor’s past, and believes that several of those flaps would mushroom so broadly that Christie soon would be eliminated from consideration by voters and donors.”
From “How Mitt Romney Made His Decision Not To Run,” Mark Halperin, Bloomberg Politics