Should I take a canvassing job in a big urban city?

(Sorry to post two questions so close together, but). I’m applying for a job with a political organization that is based around the welfare of the homeless. I had originally thought that the position was based around interacting with and educating the homeless, but now know that it is a canvassing job for this political group. The pay is pretty good (I really, really need a higher paying job, and this one pays much more than my current one).

It’s just not what I was hoping for (I’m a Psycholoy major, poli-sci makes my brain itch – in a bad way), but it’s been impossible for me to find a new job (enter hundreds of resumes sent). Does anyone know what a canvassing job is like?