"Mosh" is a protest song by Eminem released on October 26, 2004 as a digital single, just prior to the 2004 presidential election. It was released in October 26, 2004 as the second single from his fifth studio album Encore.

The video for the song is available for free on the Internet and encouraged voters to vote George W. Bush out of office. The song was excerpted from Eminem's album, Encore, not yet released at the time the video was made available to the public. G-Unit rapper Lloyd Banks also appears in the video.

This song is ranked 58th on About.com's "100 Greatest Rap Songs"

The music video for "Mosh" is entirely animated. The video starts, a scene of a school appears, and a plane is flying through with a big explosion, in a reference to the 9/11 terrorist events. Inside the classroom, Eminem is reading a book for the children. It features a school in the beginning saying the Pledge of Allegiance, then to reveal Eminem performing in Iraq for U.S. troops where a large crowd is gathered, one of which, who is also Eminem, returns home later to his wife and children only to find he has been sent back to Iraq because of George W. Bush's strategy to send more troops to Iraq during his time in office (Stop Loss). It also shows a young African American man who sees the Ku Klux Klan movements on his TV. He then joins an army of protesters, led by Eminem. By the end of the video, Eminem and the protesters are shouting at George Bush.

The last scene of the original videoclip for "Mosh" depicts a crowd bursting into a voter registration site. A second version of the videoclip was released after the 2004 presidential election, where the crowd is not bursting in to register to vote but rather entering the United States Capitol during Bush's State of the Union Address. In this version, they then proceed to make their demands heard by the U.S. Supreme Court and Congress. It shows then-Vice-President Dick Cheney suffering a heart attack.

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Wikipedia