These are links to some of the Anti-HSUS Facebook groups:
Stop the Humane Society of the United States (HSUS) - 13,000 current members
PeTA and the HSUS: The Truth - Only 59 current members, but it's a different approach
Pet Owners Against the HSUS - 820 current members
The groups are out there and joining them will only help spread the word about HSUS (since all of your friends and family will be able to see the links after you join - like a viral campaign). However, starting a group that not only targets HSUS but also Senator Nelson and any other backers of this bill would be a good idea also. If Florida residents were aware that their Senator Nelson has been involved with supporting and taking contributions from groups that associate with known terrorists (PETA) they might "lean" on him a little more to do something a little more productive with his time in "service" to his state and country.
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Stay United!

"...I say 'apparently' because despite all our progress she is not at all a tame or handle-able snake and gettting her from that cage would re-start a war.. and we've had a good armistice for several months now."-Gus Rentfro - I love this quote!