There is actually Hispanic polling that goes all the way back to Kennedy-Nixon in 1960.
No Republican presidential candidate has EVER received more than 40% of the Hispanic vote.
Also, recent immigrants from non-Hispanic countries are moving further and further to the Left.
Bob Dole got a majority of the Asian vote in 1996.
In 2012, after massive immigration, 73% of Asians voted for Obama.
Yeo, immigration serves the left and it is why JFK was obsessed with changing the immigration laws, to give us what became the 1965 Immigration Act.
Could one not conclude, therefore, that most legal immigrants tend to support government assistance and that pandering to illegal aliens of their ethnic group is not a factor?
That was only because Perot partially split the Left vote. A repeat is unlikely.