On Monday, former Minnesota governor Tim Pawlenty announced his decision to run for President of the United States. This should have been cause for concern for marijuana reformers and medical marijuana patients, and today that concern was justified. Gov. Pawlenty has been no friend to marijuana reform in the past. In 2009, he vetoed a bill that would have allowed only terminally ill Minnesotans to use marijuana to ease their pain in their final days. Even though this bill was narrowly tailored to…