GOP

On gay rights and immigration, Republicans running for president, like Florida Sen. Marco Rubio, are trying to navigate a tricky course between their party and the country at-large.

The Florida senator was supposed to be one of the emerging leaders of the Republican Party. But his leadership role on the immigration overhaul has brought a lot of criticism from his party's anti-amnesty base. His experience illustrates the divides in the current GOP.

Republicans dominate the Florida Senate -- so much so, that many run unopposed.But this year, more Democrats are challenging Republicans. The reason is a…