If Donald Trump picks Newt Gingrich as his running mate later this week, I bet it won't be even a full day before Hillary Clinton's campaign releases a commercial showing all the times Gingrich said Trump would make a horrible president. You can also expect over the next few months for her campaign to run spots with similar remarks by other Trump-endorsing Republicans who've also gone hypocritical after warning against even considering him for the job during the primaries.
On the other side, Trump's communications people probably have a similar campaign ready to go with video of Bernie Sanders -- who endorsed her this week -- claiming she was unqualified for the job when he was running against her a few months ago. But that's politics.
And you wonder why so many Americans have such low regard for people in that profession?