Newt Gingrich has come under attack recently for past marital troubles.  The thrice married, twice divorced former House Speaker was even heckled Wednesday by one Occupy Iowa City demonstrator, who told Gingrich that he had "a Ph.D. in cheating on your wife."  It remains to be seen whether these past indiscretions will affect his standing … Continue reading Is Gingirch's personal past and 'fidelity pledge' fair game? Contributor Ruben Navarrette on why a candidate's personal life should be off limits