Phil Collen and Joe Elliott of Def Leppard speak onstage during the KISS and Def Leppard announcment of their 2014 Summer tour held at The House of Blues on Sunset on March 17, 2014 in Los Angeles, California.

On July 17, CNN reported on an interesting Def Leppard collaboration: The band was scheduled to perform at Aug. 15's Iowa State Fair, with Republican presidential hopeful Donald Trump introducing it. Guitarist Vivian Campbell isn't happy.

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"I really, really, really hope that there's no truth to this rumour," Campbell wrote July 19 on his Facebook page. "Def Leppard have never been a political band, and if we were, I for one wouldn't be associating my name with this clown."

Here is Campbell's post:

I really, really, really hope that there's no truth to this rumour. Def Leppard have never been a political band, and if... Posted by Vivian Campbell on Sunday, July 19, 2015

Described by CNN as a "must-attend for presidential candidates," the Iowa State Fair is often an early indicator of how candidates will fare in election season. This is linked to the fact that Iowa is the first U.S. state to hold a caucus during each presidential election cycle.

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Styx and Tesla are also scheduled to perform at the event.

Campbell is not the first musician to have harsh words for Trump this year. Neil Young scolded him for using his song "Rockin' in the Free World" and Pitbull urged voters to support other candidates following Trump's comments about Mexican-Americans.

Billboard has reached out to Def Leppard for further comment.