This past weekend, Wisconsin governor Scott Walker messed with the wrong band. Walker -- the pro-small government, anti-unions politician -- used Dropkick Murphys’ track 'I’m Shipping Up to Boston' as his introduction song during Iowa’s ‘Freedom Summit.’

The band members of Dropkick Murphys are very pro-union and reacted to Walker’s song choice with an impassioned tweet to the Governor, “Please stop using our music in any way…we literally hate you!!! Love, Dropkick Murphys.” Walker has yet to address the comments from the band.

This isn’t the first time a politician has annoyed the band by using their music, or even the first time the group has spoken out against Walker. Diffuser rustled up a statement released by the group in 2012. That time, Jeff Fitzgerald, Speaker of the Wisconsin State Assembly, used 'I’m Shipping Up to Boston' during a republican convention.

“We just got word that Wisconsin State Rep and Speaker of the State Assembly Jeff Fitzgerald used 'Shipping Up To Boston' as his walk-on song yesterday at the Wisconsin GOP Convention in Green Bay.The stupidity and irony of this is laughable. A Wisconsin Republican U.S. Senate candidate – and crony of anti-Union Governor Scott Walker – using a Dropkick Murphys song as an intro is like a white supremacist coming out to gangsta rap! Fitzgerald: if you and your staff can’t even figure out your music you might wanna give up on the politics!!!!! We stand beside our Union and Labor brothers and sisters and their families in Wisconsin and all over the U.S!

'I'm Shipping Up to Boston' is the band's most successful song to date and their only certified platinum hit. The track's lyrics were written by Woody Guthrie and the song was included in the 2006 Academy-Award winning movie 'The Departed.'

Dropkick Murphys are gearing up to have a big 2015. They were recently announced as part of the 17th annual Punk Rock Bowling & Music Festival, alongside Rancid and Refused. That festival will be held May 22-25 in downtown Las Vegas.