Hillary Clinton won 66% of Latino voters on Election Day, according to updated National Election Pool exit poll data, a level of Democratic support similar to 2008, when 67% of Hispanics backed Barack Obama. However, Clinton’s share of the Latino vote was lower than in 2012, when 71% of Latinos voted to re-elect Obama.
While Clinton under performed among Latinos compared with 2012, Republican Donald Trump won 28% of the Latino vote, a similar share to 2012, when Mitt Romney won 27%, and to 2008, when John McCain won 31%, according to exit polls. (It is important to note that the national exit poll is a survey with an overall margin of error of plus or minus 3 percentage points for the national result.)
http://www.pewresearch.org/fact-tank/2016/11/29/hillary-clinton-wins-latino-vote-but-falls-below-2012-support-for-obama/
This is part of the problem, fewer Latinos (by %) are voting:
Especially young people:
And overall the US has really low turnout: