
** FILE ** Sen. Marco Rubio, Florida Republican, speaks on Saturday, Nov. 17, 2012, during Iowa Gov. Terry Branstad's annual birthday fundraiser in Altoona, Iowa. (Associated Press)

**FILE** Sen. Marco Rubio, Florida Republican, speaks Nov. 17, 2012, during Iowa Gov. Terry Branstad's annual birthday fundraiser in Altoona, Iowa. (Associated Press)

** FILE ** Sen. Marco Rubio, Florida Republican, speaks on Saturday, Nov. 17, 2012, during Iowa Gov. Terry Branstad's annual birthday fundraiser in Altoona, Iowa. (Associated Press)

** FILE ** Sen. Marco Rubio, Florida Republican, speaks on Saturday, Nov. 17, 2012, during Iowa Gov. Terry Branstad's annual birthday fundraiser in Altoona, Iowa. (Associated Press)

**FILE** Sen. Marco Rubio, Florida Republican, speaks Nov. 17, 2012, during Iowa Gov. Terry Branstad's annual birthday fundraiser in Altoona, Iowa. (Associated Press)

Iowa Gov. Terry Branstad, a Republican, leads one of only three states where legislative control is split between parties. Taxes and education this session will take a back seat to less-important issues so something can pass the legislature. (Associated Press)

Iowa Gov. Terry Branstad, a Republican, leads one of only three states where legislative control is split between parties. Taxes and education this session will take a back seat to less-important issues so something can pass the legislature. (Associated Press)

** FILE ** Iowa Gov. Terry Branstad speaks during an interview with The Associated Press, in this May 11, 2011 photo. The Iowa straw poll has devolved into a full-blown sideshow, Branstad and other critics contend. They say it's an unfair and false test that has felled good candidates and kept others from competing in the state. (Associated Press)

** FILE ** Iowa Gov. Terry Branstad speaks during an interview with The Associated Press, in this May 11, 2011 photo. The Iowa straw poll has devolved into a full-blown sideshow, Branstad and other critics contend. They say it's an unfair and false test that has felled good candidates and kept others from competing in the state. (Associated Press)