Can their ever be another 50 state sweep and how would a person achieve the goal

[Asian Nazi]

There would have to be another realignment first.  Right now both parties have absolute floors in the low forties and would still be able to win large swaths of the country even in worst case scenarios.  In the 20th century there was a slow realignment that essentially went on from 1920-2000 (interrupted by the Great Depression) in which partisan identity was weak and shifting and landslides were possible.  Now, we're entering a period more like 1868-1920 where partisan identity is high, the map changes very little from election to election, and absolute landslides are difficult to impossible.