Sure, googling for "charitable contributions by political party" gives the original article I was thinking of:

http://www.washingtonpost.com/blogs/wonkblog/wp/2012/10/21/s...

which I favored as opposed to the various studies that show Liberals tend to give less often and in smaller amounts of both time and money: http://www.huffingtonpost.com/2013/08/19/giving-back-_n_3781... and http://www.nationalreview.com/home-front/357562/which-politi...