Two of the possible Republican candidates are from Florida and are very popular there. That puts both Bush and Rubio into a favorable position for the nomination, and could help them both in the general election.
No matter how many times I explain it to them, my kids can't seem to grasp that the people's choice in the world's oldest democracy is not necessarily the one who assumes the country's highest office, but they're only 10 (twins).
If Americans were told to choose between two cars, shirts, colors or family sizes, we'd rise up in revolt. Tell us we have only two parties, however, and we accept it as though any alternative is unimaginable.