 First thing you need to know before tomorrow, President Trump today named Ohio Senator J.D. Vance to be his vice presidential running mate. Vance served in the Marines before moving to San Francisco to work for a venture capitalist firm. Vance wrote the bestselling book Hillbilly Eulogy, which was later turned into a movie for Netflix. He then moved back to his home state of Ohio and started another investment firm before running for Senate. Vance has only been in the Senate for a year and a half.