What does "sweep" mean in?

Question

Later, Yang made his case directly to Congress on a sweep through Capitol Hill.

Answer 1

as in : the flu will sweep the nation
This means that the flu will go from one end to the other and cover everything. As if the people were dirt and the flu was the broom.
Yang, more or less, went person to person and then took his case directly to Capitol Hill.

Answer 2

One of these definitions - whichever fits the rest of the context the best,

To move across or through swiftly or with great intensity: (News of the lunar landing swept the country.)

To pass quickly across, as when searching: (His gaze swept the horizon.)