40% from Latinos wouldn't win them the 2016 election
Republicans need 74% of the Latino vote to win the 2016 election, neither will happen. Wasting time appealing to Latinos guarantees the Democrats another election, which is what Democrats want them to do. Democrats know, even if Republicans support Amnesty, polling shows a strong majority will still vote Democrat.
The statistics show: Passing amnesty will not move Hispanic voters into GOP column | Western Free Press
They are better off moving in a white populist direction to appeal to their white middle class/working class base. All they need is 4 more percent of the White vote.
http://www.nytimes.com/interactive/...math-demographics-and-immigration-reform.html
The white populist position can't carry enough of that white vote, who want nothing to do with white supremacist nationalists.
Most Americans want a non-interventionist foreign policy, repeal of free trade, oppose bailouts, want lower middle class taxes, no amnesty, and less immigration, among other things. These aren't White Supremacist positions, this is what most people want, but their interests aren't represented in Washington.
And representing your core constituency is not racist, it is reasonable and should be the norm, increasing your share of the vote to win elections isn't racist, it is rational.