Booker and the Kushners go way back. Charles Kushner helped fund Bookers first failed mayoral campaign in 2002, and Booker came to his defense when he was convicted in 2005.
Charlie has helped fuel my hope, as well as made me believe that even in the questionable world of New Jersey politics, there are still spirits who dont simply act in their self-interest, Booker wrote glowingly of Kushner before he was sentenced.
Booker maintained his relationship with the Kushners. In 2013, Ivanka Trump and Jared Kushner hosted Booker at their home in a fundraising event that raised $41,000 for Booker. He defended this relationship in 2017, well after their (unsurprising) conservative turn.
Listen, I wouldnt take a dime from them now, but this was a time when they were Democrats, Booker said at the time. I mean, they were supporting Hillary Clinton, uh, and the Kushner family were big New Jersey Democrats, and really helped to fight against Chris Christie and a lot of other folks.
https://newrepublic.com/post/195475/cory-booker-democrat-vote-confirm-jared-kushner-father-charles