Jon Bon Jovi is a hardcore Democrat. Chris Christie announced his candidacy for the Republican presidential nomination Tuesday.

LIVINGSTON TWP., NJ - JUNE 30:   New Jersey Gov. Chris Christie waves while announcing his candidacy for the Republican presidential nomination at Livingston High School on June 30, 2015 in Livingston Twp., New Jersey. Christie made the announcement in the gymnasium of his alma mater, becoming the 14th candidate to join the Republican field.  (Photo by Jeff Zelevansky/Getty Images)

LIVINGSTON TWP., NJ – JUNE 30: New Jersey Gov. Chris Christie waves while announcing his candidacy for the Republican presidential nomination at Livingston High School on June 30, 2015 in Livingston Twp., New Jersey. Christie made the announcement in the gymnasium of his alma mater, becoming the 14th candidate to join the Republican field. (Photo by Jeff Zelevansky/Getty Images)

So why did Bon Jovi allow Christie to use his music at Christie’s announcement event just a day after Bon Jovi hosted a lavish fundraiser for Hillary Clinton?

The answer is simple.

Unlike so many Republicans in the past, Christie asked (probably politely).

And Bon Jovi gave his blessing.

NEW YORK, NY - JUNE 12:  Jon Bon Jovi performs onstage at the Songwriters Hall of Fame 45th Annual Induction and Awards at Marriott Marquis Theater on June 12, 2014 in New York City.  (Photo by Larry Busacca/Getty Images for Songwriters Hall Of Fame)

NEW YORK, NY – JUNE 12: Jon Bon Jovi performs onstage at the Songwriters Hall of Fame 45th Annual Induction and Awards at Marriott Marquis Theater on June 12, 2014 in New York City. (Photo by Larry Busacca/Getty Images for Songwriters Hall Of Fame)

The singer told Mother Jones his decision wasn’t based on any political leanings.

“My friendships are apolitical. And, yes, I absolutely gave him permission to use my songs,” he said.

PATERSON, NJ - MAY 02:  New Jersey Governor Chris Christie and Jon Bon Jovi attend the Overdose Prevention Act Bill signing at Barnert Medical Arts Complex on May 2, 2013 in Paterson, New Jersey.  (Photo by Dave Kotinsky/Getty Images)

PATERSON, NJ – MAY 02: New Jersey Governor Chris Christie and Jon Bon Jovi attend the Overdose Prevention Act Bill signing at Barnert Medical Arts Complex on May 2, 2013 in Paterson, New Jersey. (Photo by Dave Kotinsky/Getty Images)

Christie and Bon Jovi became good friends during the clean-up and relief effort that followed Hurricane Sandy, which devastated the New Jersey Coast. Since then, the two have been good buds.

Follow Josh on Twitter