Had someone like former Florida Gov. Jeb Bush entered the 2012 Republican primary, Mitt Romney says he might not have entered the presidential race. In an interview with Dan Balz for the Washington Post reporter’s soon-to-be released “Collision 2012: Obama vs. Romney and the Future of Elections in America,” Romney said that he would have seriously considered staying out of the presidential race if someone of Bush’s caliber declared his candidacy. “I knew how grueling the process was, and I felt that there may be others who could be more effective in actually winning and then getting America on course,”...