Former Attorney General William Barr says the Biden administration is “ignoring legal standards and scientific evidence” to justify its proposal to federally reschedule marijuana, even as former President Donald Trump, who appointed him, has recently embraced state-level legalization. In an op-ed for Fox News that was published on Thursday, Barr took aim at the Biden-Harris administration for pushing to move cannabis from Schedule I to Schedule III under the Controlled Substance Act (CSA). He said…