Donald Trump is narrowing down his potential vice presidential picks and is looking closely at selecting Sen. Marco Rubio (R-FL). NBC News is reporting that the Florida senator has risen up on the short list to become the 45th president’s running mate in the 2024 contest. “The list is long, and it’s extremely early in any kind of process,” one Trump adviser said, not addressing the Rubio rise. “No one has been directly reached out to yet, and I do not expect that for some time.” Earlier this month, Trump counted about 15 contenders that he’s eyeing to serve on the GOP ticket, including the 52-…