The freshman Republican from Louisiana has a famous name and a low-key approach — except for the occasional comedic swing.
Mr. Thomson also encouraged Mr. Murdoch to buy The Wall Street Journal and, according to one person who knows both men, was a driving force behind the News Corporation’s offer.
The impetus, power, or energy behind something in motion, as in He was clearly the driving force in the new administration.
This term transfers the force that sets in motion an engine or vehicle to other enterprises. Ralph Waldo Emerson was among the first to use it figuratively (English Traits, 1856): "The ability of its journals is the driving force."
Definitions of waldo
a remote manipulator, as for puppets, operated either mechanically or electronically.
Robert Heinlein was responsible for ‘ waldoes ,’ those automated gloves that scientists use to manipulate dangerous items by remote control.