WASHINGTON (AP) — Florida Sen. Marco Rubio, a leading proponent of overhauling the immigration system who has gained attention in GOP circles, will deliver the Republican response to President Barack Obama's State of the Union address on Tuesday. House Speaker John Boehner, R-Ohio, and Senate Republican leader Mitch McConnell, R-Ky., announced the selection of Rubio on Wednesday, calling him a strong advocate of conservative principles. Rubio will speak after Obama's prime-time address before Congress, offering a counterweight to the president's agenda. The high-profile speech also ... Read More