Actually there is no such thing. It's a bimodal saddle with two nodes ~ we call one the Republican party and the other the Democrat party.
Politicians who go for the middle, for the independents, for the moderates ~ LOSE!
After all, there's nothing out there but a thin fringe with few votes. Nothing wrong with being a member of that fringe ~ sometimes they are ahead of the big coalition parties, but it also means you don't usually win any elections.
Murdoch obviously mispent his yout' in foreign schools