Trump is being and has been 'interviewed' by millions of Republicans (and in some States, Democrats and Independents).   A plurality of those interviewers have selected him as the nominee.  

As I've stated before, the next President is not going to be selected by those who watch OPB.   The winner will be selected by people who watch Trump's reality shows, beauty contests, and World Wide  Wresting shows that he has sponsored and other similar hoi polloi, many of whom are not college professors or otherwise part of the reputed 'intelligentsia'.  

He, and Bernie Sanders, have identified millions and millions of unhappy people who distrust those who 'know what's best for us', those who have bought Hillary Clinton, and those who continue to live off the political donations of Wall Street and the other multi-millionaires in the 1%.

The 'bouncing' most of them seem to be concerned about is 'bouncing' those politicians and their money men from control of our country.