Bipartisan Senate legislation to be announced Tuesday would shield medical marijuana patients, doctors and businesses from federal prosecution in states that have legalized marijuana for medical purposes, and would remove marijuana from the category of most-dangerous drugs, The Huffington Post has learned.

The federal government has subsidized the criminalization of millions of young people simply for having a small amount of pot. “Whites Smoke Pot, but Blacks Are Arrested.” That was the headline of a column by Jim Dwyer, the great Metro desk reporter for The New York Times, in December 2009.