Three days after a new legalization law went into effect in California, Attorney General Jeff Sessions ended an Obama-era policy that allowed legalized marijuana to flourish across the U.S.

Professor at Anne Arundel Community College Shad Ewart says patients and regular users may not be affected much, but business could see some blow-back from the federal government, although he thinks that is unlikely.

"There's going to be a backlash for two very specific reasons, No. 1 there are unequivocal medical benefits," Ewart said. "The second reason why [is] economic benefits, the job creation has just been stunning and with job creation and economic activity you have tax revenue coming into each one of these states." 

Ewart also says he thinks this could be a major topic in the November elections. 

Ewart teaches the only course in Maryland that address the entrepreneurial opportunity of cannabis.