My name is Mary Elizabeth Davis.

I am a retired licensed vocational nurse with severe osteoarthritis and need to have both my knees replaced. All the pharmaceutical medications I have been prescribed have caused side effects including: additional pain, vision problems, nausea and blood clots.

My doctor eventually recommended I try medical cannabis, and I found Berkeley Patients Group, a not-for-profit medical cannabis collective, that has successfully treated me where pharmaceuticals failed.

On May 1st, after operating for over 12 years without incident and with full local support, the Federal Government forced Berkeley Patients Group to close its doors by threatening its landlord with property forfeiture and decades in prison.

Today I am speaking not only for myself, but in the name of millions of patients, here in the United States, who like me, have been denied access to medical cannabis and been thrown to the street with no alternative.

President Obama promised at the beginning of his administration to respect state medical marijuana laws. He has broken this promise time and time again -- and the consequences have been devastating.

Tell President Obama and the Justice Department: enough is enough. Keep your campaign promise, and stop the attacks on medical cannabis patients!