US citizens: phone (202) 224-3121 three times, once to ask for your representative in Congress, then once for each of your two senators, and say to each one something like this:

I’m a constituent, and I’m calling to ask [name of official] to publicly speak out against the so-called fiscal commission. Social Security and Medicare are popular and vital programs to our nation’s economic security. Any changes to those programs should be handled through regular order, not behind closed doors. Voters want to see Social Security expanded, not cut!