[caption id="attachment_141591" align="aligncenter" width="5184"] Democratic presidential candidate Sen. Bernie Sanders, I-Vt., (AP Photo/Charlie Neibergall) 

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Sen. Bernie Sanders (I-Vt.) will officially unveil new legislation to raise the minimum wage to $15 an hour for all workers Wednesday,

Reps. Keith Ellison (D-Minn.) and Raul Grijalva (D-Ariz.) will join Sanders at the press conference, The Hill reported, and are expected to announce identical legislation in the House.

While Sanders has long been a proponent of a $15 minimum wage, this is the first bill he is introducing to actually make it happen.

His Democratic presidential primary opponent, Martin O'Malley, has also officially called for a national hike to $15 an hour. The frontrunner Hillary Clinton has not committed to a specific dollar amount though she has said she would like to see it raised.

Sanders' legislation presents the highest minimum wage that has ever been proposed by legislation in Congress, The Hill noted. It would raise the minimum wage in increments until it reaches $15 an hour by 2020.

This is the same strategy that is being employed in Los Angeles, which is the largest city in the nation to increase its minimum wage to $15 an hour. However, its mayor, Democrat Eric Garcetti, was recently quoted as saying that what works in L.A. probably wouldn't work nationwide.

“Different economies need different levels. The cost of living is different, and you need to cater to what works for your city,” Garcetti said during a recent speech at Washington’s National Press Club.

Sanders' bill is unlikely to come up for vote in the Republican-controlled Senate.