On the eve of 4/20, the Senate’s top Democrat came out for ending the federal prohibition of marijuana.

Senate Minority Leader Chuck Schumer (D-NY) is introducing a bill that would deschedule marijuana, Shawna Thomas reported for Vice. Descheduling would remove cannabis from the strict regulatory standards set by the Controlled Substances Act, the blueprint for US drug policy. That would not fully legalize marijuana across the US, but it could allow states to carry out marijuana reform — from decriminalization to medical legalization to outright legalization — without the threat of federal interference.

“Ultimately, it’s the right thing to do,” Schumer said. “Freedom. If smoking marijuana doesn’t hurt anybody else, why shouldn’t we allow people to do it and not make it criminal?”

Schumer’s bill would also take several other steps, Thomas reported:

His bill would also would [sic] create some funding for minority and women-owned marijuana businesses, provide money for research into overall effects of marijuana and it’s specific effect on driving impairment. And lastly, it would “maintain federal authority to regulate marijuana advertising in the same way it does alcohol and tobacco,” which Schumer said is to make sure marijuana businesses aren’t targeting children with their ads.

Schumer previously supported medical marijuana and letting states experiment with legal pot. His shift effectively makes him more proactive, legislatively, on the issue — and would, if it eventually gets through Congress, upend decades of federal drug policy.

But the bill very likely does not have the votes to get through. Republicans, which control both houses of Congress, remain in firm opposition to legalization. (Although some have flipped, such as former Speaker John Boehner.)

Democratic lawmakers are increasingly on the other side of the issue. Sen. Bernie Sanders (I-VT) came out for descheduling marijuana when he ran for the Democratic presidential nomination in 2016. Sen. Cory Booker (D-NJ) in 2017 put forward a sweeping bill that would not only deschedule marijuana but encourages states to legalize weed with federal money. Sens. Ron Wyden (D-OR) and Kirsten Gillibrand (D-NY), along with Sanders, are co-sponsors on Booker’s bill.

There’s a good reason why top Democrats are coming out in favor of legalizing pot: Their base wants them to. Marijuana legalization has been incredibly popular among Democrats for years — and it seems that Democratic lawmakers are waking up to that reality.

Marijuana legalization is very popular

Gallup’s latest survey in 2017 found that 64 percent of US adults back legalization, up from 36 percent more than a decade before. Not only did a strong majority of Democrats (72 percent) support legalization, but Gallup found that a majority of Republicans (51 percent) did as well.

(One caveat: Anti-legalization advocates argue that if surveys offered options between decriminalization, medical legalization, and recreational legalization, voters would be much less likely to say that they back full legalization.)

Marijuana has been legalized for recreational use in nine states and Washington, DC, and it has been legalized for medical purposes in 29 states.

One of the reasons for the growing support may be these experiments with legalization at the state level: Since Colorado became the first state to allow recreational marijuana sales in 2014, the policy has proven to not be the complete disaster opponents of legalization warned it would be. (Although experts caution it’s still too early to judge the full effects.) That has likely driven more Americans to reevaluate their opinions on the issue — so now nearly two-thirds of voters support legalization.

And now, legalizers have the Senate’s top Democrat behind them.

For more on marijuana legalization, read Vox’s explainer.