On the other side of the political spectrum, California Republican Darrell Issa has said the act has no chance of passing (via the Wrap):
Congress is realizing there are so many unintended consequences that they can't just use Google as a piñata and bash on it here. There is a very broad coalition from far left to far right who realize this will hurt innovation, something we can't afford to do. And there are other ways to accomplish what they say is their goal.
Issa would go on to call the proposal "dangerous" in its current form.
SOPA has seen strong opposition from major tech firms like Google, Facebook, eBay, Yahoo, AOL and more as well as a huge uprising from citizens and heavily trafficked sites like Reddit. The bill is backed in force by the MPAA, RIAA and other content providers.
For more information on SOPA, check here: The 2011 Stop Online Piracy Act