I think calling might be considered more effective. It shows that you are willing to invest enough time and actually make your concerns heard. I think they migh

I think calling might be considered more effective. It shows that you are willing to invest enough time and actually make your concerns heard. I think they might weight calls like TV networks. Your 1 call counts as 1,000 people who wouldn't care to call. Of course the most effective thing to do would be to befriend your congressman personally. On a larger scale, organizing a sort of free internet seal of approval for all representatives could be even more powerful. If representatives know that voters would be more likely to vote for candidates with the seal of approval, then they might be persuaded to earn that seal.