Gardner responded to Sessions' January memo that directed federal prosecutors to focus once again on enforcing federal cannabis laws - even in states that had legalized marijuana - by threatening block any DOJ nominations until the Trump administration assured him they would protect states' rights to regulate cannabis. Gardner said Trump assured him he would support legislation "to fix this states' rights issue once and for all".
"Because of these commitments, I have informed the Administration that I will be lifting my remaining holds on Department of Justice nominees".
It marked the latest flip by the president who pledged while he was campaigning to respect states that legalized marijuana but also criticized legalization and implied it should be stopped.
This story is developing and will be updated.More news: Nikki Haley: No Decision Made Yet On Syria
Erik Altieri, executive director of the National Organization for the Reform of Marijuana Laws, said Sessions' hiring did not reflect Trump's promise to protect state's rights.
However, at the Conservative Political Action Conference in 2015, Trump said he supported medical marijuana but called recreational pot "bad".
"With the President now reiterating this commitment, it is time for Congress to do its part and swiftly move forward bipartisan legislation that explicitly provides states with the authority and autonomy to set their own marijuana policies absent the fear of federal incursion". During the presidential campaign, Trump said in an interview with KUSA-TV in Colorado that he said "it's up to the states" on the marijuana issue. "We hope the president - who doesn't want to be known as the "Pot President" - will reverse course soon", said Kevin Sabet, founder of Smart Approaches to Marijuana.
A bill has not been finalized, but Gardner has been talking quietly with other senators about a legislative fix that would, in effect, make clear that the federal government can not interfere with states that have voted to legalize marijuana.More news: Google suffers defeat in landmark 'right to be forgotten' case
When he selected Sessions, a former federal prosecutor and US senator from Alabama, as his attorney general, marijuana supporters girded themselves for a crackdown. The Washington Post reported in August that Sessions' DOJ was effectively hamstringing the agency's research efforts by making it harder to grow marijuana.
The president has frequently criticized Sessions, particularly over his decision to recuse himself from oversight of the federal investigation into potential collusion between Trump's 2016 presidential campaign and Russian Federation.
Gardner and the Department of Justice have been in discussions for months to get the holds lifted.
President Trump is going green - and Attorney General Sessions is likely seeing red.More news: SUV that fell in river belonged to missing family
Such a bill has not been drafted or passed.