What is the origin phrase sweeps the nation originate?

"Sweeps the nation" comes from the first PacMac game in the early 60s. In the game, PacMan is seen to use a broom and dustpan to get rid of the killer ghosts. Once the ghosts were dispatched, PacMan would move on to sweep up other areas of the game. When the entire nation had been swept, the game would end. Thus "sweep the nation" came to mean anything that effectively covered the entire nation in a small amount of time. (A full game only lasted a few minutes.)