Statistically useless figure in terms of the Democratic leaning voters plurality. See this graph from the report:
They broke up all the religious categories by race but not unaffiliated. There are still more Protestants overall than unaffiliated.
I'm surprised there are so few Hispanic Catholics.
As to the news report itself, eh. 
1) a lot of them can't vote
2) a lot of them don't vote
3) only 62% of U.S. Hispanics are Catholic, and those that are are more likely to be U.S. citizens and to actually vote
