The president's decision will reflect a separation from U.S. Attorney General Jeff Sessions, that in January rescinded an Obama-era coverage, called as "the Cole memo", that gave countries greater leeway within the national administration on bud coverage.
"Since the campaign, President Trump has consistently supported states' rights to decide for themselves how best to approach marijuana", Senator Gardner said in a statement. "Late Wednesday, I received a commitment from the President that the Department of Justice's rescission of the Cole memo will not impact Colorado's legal marijuana industry".
"Additionally", Gardner added, "President Trump has promised me that he will support a federalism-based legislative remedy to fix such conditions' rights difficulty once and for all".
Gardner said he had earlier allowed some Justice Department nominations to proceed after having "positive discussions" with the department, and will now allow the remaining blocked nominations to move forward.
When he selected Sessions, a former federal prosecutor and US senator from Alabama, as his attorney general, marijuana supporters girded themselves for a crackdown.
Mr. Trump offered qualified support for legalization while on the presidential campaign trail, saying that medical marijuana "should happen" and that laws regarding recreational usage should be left in the hands of the states.
That memo was replaced with a new order from Sessions which allows local USA attorneys to decide whether to prosecute these businesses under the Controlled Substances Act (CSA), which bans marijuana in all 50 states regardless of local law.More news: Dez: Playing in NFC East 'something I want'
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Gardner said in a phone call with President Donald Trump Wednesday night, he was promised the DOJ would not target Colorado's legal marijuana industry. Satisfied, the first-term senator is now backing down from his nominee blockade.
The co-directors of the 2012 Amendment 64 campaign that legalized marijuana for adults in Colorado, Mason Tvert and Brian Vicente, have issued statements in response to the news.
On Friday, White House legislative affairs director Marc Short said, Trump "does respect Colorado's right to decide for themselves how to best approach this issue".
Department leaders have "shown in good faith their willingness to provide what I think will be hopefully the protections we sought, and as sort of a good faith gesture on my behalf I'll be releasing a limited number of nominees", Gardner told The Associated Press on Friday.
Since then, he has held up about 20 Justice Department nominations.
Maybe we shouldn't get too excited until there's an actual piece of legislation protecting marijuana states.
Senator Gardner reiterated that he and his colleagues "are continuing to work diligently on a bipartisan legislative solution (to the state/federal conflict) that can pass Congress and head to the President's desk". He has opposed decriminalizing the substance as an elected official.