Will byzantine seldom-evoked party rules changes in mid-convention be a repeat of 2012 in order to shut out a Trump nomination in 2016? In 2012, delegate rules were changed mid-convention that shut out Ron Paul's nomination. If rules are again changed mid-convention regarding Trump, will a riot ensue? If Trump successfully is shut out due to a rule change - would that give Trump a emotional breakdown? He already accused the GOP of having a rigged system but now that he is the presumptive nominee, he no longer cares.