Facebook CEO Mark Zuckerberg is once again inserting himself into the New Jersey political scene – but this time it’s on the completely opposite side of the aisle.

Bloomberg reports that Zuckerberg and his wife Priscilla Chan will soon host a fundraiser for Newark Mayor and Senate hopeful Cory Booker..

“Mark and Priscilla are hosting a fundraiser for Mayor Booker in the coming days,” a Facebook spokesperson told Bloomberg.

Booker is running to replace recently-deceased Democrat Frank Lautenberg in the U.S. Senate.

If you recall, this isn’t the first fundraiser that Zuckerberg has staged for a prominent New Jersey politician. Back in February, he hosted a fundraiser for New Jersey Governor Chris Christie at his Palo Alto home.

It’s worth noting that Zuckerberg is throwing his weight behind politicians from across the spectrum – Christie being a Republican and Booker being a Democrat.

Zuckerberg doesn’t just have a history in New Jersey politics – but in Newark, specifically. Back in 2010 the Facebook CEO donated $100 million to the struggling Newark public school system. Since then, he’s been linked to both Christie and Booker.

Booker just officially announced his Senate bid last week.