The fundraiser is a private event being hosted at the home of New York Jets owner Woody Johnson, and will be co-hosted by RNC Chairman Reince Priebus.
Of the six Republican lawmakers attending, all except Snyder have received serious discussion as potential presidential candidates in 2016.
Some of them have had frosty relations in recent months.
Paul and Christie feuded with each other in late July over national security and budgetary issues, with Christie suggesting Paul was uncaring toward those affected by Hurricane Sandy while Paul called Christie the “king of bacon.”
Rubio, meanwhile, has been a big supporter of the Senate’s recently-passed immigration reform law, a bill Paul has opposed.