No president is complete without a veep. As Trump auditions Chris Christie, Mike Pence and Newt Gingrich and Clinton considers Tim Kaine, can the candidates find the right-hand man for the job who will make, not break, their campaign?

The jeers and boos of Sanders diehards ring out in Philadelphia, before the Democrats at last make Hillary a historic nominee. But is shattering a glass ceiling enough for Clinton and Kaine to unite the party into a winning coalition?