stumping (Noun) — Campaigning for something by making political speeches (stump speeches).
stumping (Verb) — Cause to be perplexed or confounded. ex. "This problem stumped her"
stumping (Verb) — Walk noisily, heavily or angrily. ex. "The men stumped through the snow in their heavy boots"
stumping (Verb) — Travel through a district and make political speeches. ex. "the candidate stumped the Northeast"
stumping (Verb) — Remove tree stumps from. ex. "stump a field"