Gallup's polling data on Hispanic party preference is linked below.
Gallup: Hispanics Prefer the Democrats
"Hispanics in the U.S. identify with or lean toward the Democratic Party over the Republican Party by about a 2-to-1 margin, regardless of whether they were U.S.-born."
---Frank Newport and Joy Wilke, Gallup
Politico's look at the Gallup poll is linked below.
Politico: Hispanic Support for the Democratic Party
"Hispanics tilt Democratic by a 2-to-1 margin over Republican, a new survey shows."