With the pomp and pageantry of his official nomination just days away, Donald Trump's search for a running mate on the Republican presidential ticket is in the home stretch, with a trio of frontrunners jockeying to be first across the finish line.
The former US president is seeking a number two who can walk the delicate line between helping mobilize Trump's right-wing base and staying in lane as a sidekick who won't hog the limelight or, worse, prove more popular than the boss.
