They were canvassing for votes in the forth coming election.
Canvassing - 2012 was released on: USA: March 2012 (internet)
Canvassing is typically used to convince constituents to part with their vote with a particular party affiliation. This can done by media campaigns as well as door-to-door canvassing.
Yes, canvassing for a candidate is one way of participating in the political process.
Canvassing - 2011 was released on: USA: 8 February 2011 (Tisch West Web Series Showcase)
volunteers
canvassing
Canvassing - 2011 Mitch 1-7 was released on: USA: 5 November 2012
Canvassing - 2011 Pilot 1-1 was released on: USA: 1 March 2011
Canvassing - 2011 Stalin 1-2 was released on: USA: 2 March 2011
Canvassing - 2011 Elbow Tap 1-4 was released on: USA: 5 November 2012
Canvassing - 2011 Them's the Rules 1-9 was released on: USA: 5 November 2012