Several potential rival presidential candidates are teaming up on legislation to end the federal war on marijuana.

On Thursday, U.S. Sen. Bernie Sanders (I-VT) is signing on as a co-sponsor of the Marijuana Justice Act, introduced last year by Sen. Cory Booker (D-NJ).

Many political observers expect that Booker and Sanders will compete for the Democratic presidential nomination in 2020. Sen. Kirsten Gillibrand (D-NY), another rumored contender, is also a co-sponsor of the bill.

Although the three senators may be just months away from the start of a hard-fought political nominating contest, they are linking arms in support of the most far-reaching cannabis reform bill ever to have been filed in Congress.

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