Florida Sen. Marco Rubio announced his presidential candidacy in a conference call to his top donors Monday morning.
The phone call precedes a political event Monday night at Miami’s Freedom Tower, where he will formally announce his campaign to the rest of the public.
The Freedom Tower was a processing center for Cuban refugees escaping Fidel Castro’s leadership, and it reflects both his Cuban heritage as well as his immigration work in the U.S. Senate. Rubio helped draft a bipartisan immigration bill in 2013 that diluted his support from the right and the left as both were unsatisfied with the middle-of-the-road legislation.
Rubio, 43, is the youngest candidate to enter the race. He has previously served as a state representative for his home state Florida as well as speaker of the Florida House of Representatives.
Former Florida Gov. Jeb Bush is also expected the formally enter the race, creating state divide between Bush and Rubio.
Rubio is the third Republican and the fourth candidate to enter the race. Texas Sen. Ted Cruz announced March 23, and Kentucky Sen. Rand Paul announced last Tuesday. Former Secretary of State Hillary Clinton announced Sunday.