Latinos have long favored Democrats, but Republican presidential nominee Mitt Romney is on track to win over even fewer Hispanic voters than the GOP's other recent presidential contenders.

A Pew Research Center survey of registered Latino voters found that 21 percent backed Romney compared with 69 percent for President Barack Obama. That is 10 percentage points less than Republican nominee John McCain won four years ago and 19 percentage points less than former Republican President George W. Bush won in 2004. Read More