Legalize the sales and use of Marijuana

I believe Marijuana should be legalized. I believe we the American people must urge for Marijuana to be legalized. Marijuana is a great medicine for AIDS, ADHD, ADD, and numerous other health problems including cancer. Also, it could help this economic struggle we are in today by selling Marijuana like we sell tobacco, why let the Mexican drug cartels make billions of dollars every year from selling Marijuana when our government could. Also, we could have less crowded jail systems in the USA because well above 75% of people who are in jail for drug abuse are in the jail because of Marijuana possession.