Marion McKeone: Trump needs a hero vice president to reassure the doubters

Minds are becoming concentrated on who will join Hillary Clinton and Donald Trump in their race to the White House

Hillary Clinton is in pole position for the Democratic nomination for the White House Pic: Getty

It’s that time of the election cycle again. With the conventions, and all their surreal pageantry, little more than a fortnight away, the vice-presidential guessing game has started in earnest.

As a general rule of thumb, the more competent the candidate, the less important his or her choice of running mate. Who cared if Dan Quayle was a moron? George Bush sr was able to carry his own water. But when it came ...