The phrase "huge outpouring" means a large or significant expression of emotions, opinions, support, or assistance from a group of people. Full definition
The RNC may ultimately be backed into a corner by a huge outpouring of support for Paul. (religion.blogs.cnn.com)
This huge outpouring of grassroots support bolstered efforts in Congress — led by Congresswomen Rosa DeLauro (D - CT) and Chellie Pingree (D - ME)-- to get language into the 2015 omnibus spending bill keeping Chinese - processed chicken out of school food and other child nutrition programs. (thelunchtray.com)
The death of David Cameron's son Ivan prompted a huge outpouring of popular sympathy (more clichés, but in this post-Diana world they come so easily). (politics.co.uk)