The man who wants to test his power against Prime Minister Benajmin Netanyahu, Israel's popular "King Bibi," works in a surprisingly understated, tube-shaped office with three telephones ringing off the hook. The only thing that stands out is a picture on the wall. Covered in glass, it shows an embroidered figure of a woman wearing an apron dress. Economics Minister Naftali Bennett, 42, is keen to show that he doesn't hold much regard for the daily grind of political life and that if it weren't for the azure silhouette of his great aunt Zila embroidered in yarn, he might instead...