President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE said Friday that he will likely support a bipartisan bill, introduced by Sens. Elizabeth Warren Elizabeth WarrenDimon: Wealth tax 'almost impossible to do' CNN's Don Lemon: 'Blow up the entire system' remark taken out of context Democrats shoot down talk of expanding Supreme Court MORE (D-Mass.) and Cory Gardner Cory Scott GardnerCook Political Report shifts Colorado Senate race toward Democrat Overnight Health Care: US coronavirus deaths hit 200,000 | Ginsburg's death puts future of ObamaCare at risk | Federal panel delays vote on initial COVID-19 vaccine distribution The Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting MORE (R-Colo.), to allow states to regulate marijuana without federal interference.

"I support Sen. Gardner. I know exactly what he's doing," Trump told reporters. "We're looking at it. But I probably will end up supporting that, yes."

A day earlier, Garner and Warren, who both represent states with legal recreational marijuana, introduced the Strengthening the Tenth Amendment Through Entrusting States Act, in response to increasing opposition toward the substance from Trump's Department of Justice.

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The bipartisan bill would amend the Controlled Substances Act to include a framework that says it no longer applies to those following state, territory or tribal laws “relating to the manufacture, production, possession, distribution, dispensation, administration, or delivery of [marijuana]."

The two senators announced a partnership on the legislation in April in an effort to hold Trump to his word about favoring a states-rights approach to recreational pot, a position he voiced during the 2016 presidential race.

Attorney General Jeff Sessions Jefferson (Jeff) Beauregard SessionsGOP set to release controversial Biden report Trump's policies on refugees are as simple as ABCs Ocasio-Cortez, Velázquez call for convention to decide Puerto Rico status MORE, a staunch opponent of marijuana legalization, in January rolled back the so-called Cole memo, which ordered U.S. attorneys in states where the substance has been legalized to deprioritize prosecution of marijuana-related cases.

Warren said the goal of the legislation is to “ensure that each state has the right to determine for itself the best approach to marijuana within its borders.”

Medical marijuana is legal in more than two dozen states and recreational marijuana is legal in nine states and Washington, D.C.