During the letter writing campaign for Malawi, we were instructed to contact all government officials living in our territory to ask them to join the letter writing campaign. I was new, and diligently followed that instruction, seeking out all local/district/county councillors, and giving them the templates we had.
If your average Dub was asked to write to political leaders on behalf of any other group, say Syrian refugees, they would say, "sorry, can't help, it would compromise my political neutrality".
Wouldn't it be great if they widened their campaign and started asking the public in general to join them? I would love to see their face when they knock on my door and I tell them I can't help because I'm politically neutral.