Below is a table showing an estimate of Hispanic turnout in 2008. These figures were determined by multiplying a state’s overall turnout by the share of voters who described themselves as Hispanic or Latino in exit polls. In total, about 11 million Hispanics turned out to vote in 2008, according to these estimates.
However, almost 40 percent of the Hispanic vote was in one of just two states – California and Texas – that don’t look to be at all competitive this year. The fact that Democrats are winning clear majorities among Hispanics is one reason that California is no longer competitive, of course. And perhaps Texas will become more competitive in another 8 or 12 or 16 years. (Although note that many Hispanics in Texas have been there for generations and might not be thought of as immigrant communities.) But voters in these states just aren’t likely to sway the Electoral College outcome in 2012.
New York and Illinois, which also aren’t at all competitive, and New Jersey, which is only very marginally so, also have a decent number of Hispanic voters. You do see Florida up near the top of the list, however, and Arizona and Colorado not far down, so I will need to be a bit more precise about my analysis to defend my claim.