His name is Norman Braman, and you can read about his financial relationship with Marco Rubio in the New York Times:

“MIAMI — One day in the State Capitol in Tallahassee, Marco Rubio, the young speaker of the House, strayed from the legislative proceedings to single out a lanky, silver-haired man seated in the balcony: a billionaire auto dealer named Norman Braman. This man, Mr. Rubio said in effusive remarks in 2008, was no ordinary billionaire, hoarding his cash or using it to pursue selfish passions. …”

Note: As of late, the New York Times has been refreshingly honest about how Jewish billionaires like Sheldon Adelson and Norman Braman are pulling the strings of their Republican puppets like Lindsey Graham, Tom Cotton, and Marco Rubio. Scott Walker is flying to Israel right now to meet with his constituents.