But there is evidence to back Trump's claims. A
2014 study in the online Electoral Studies Journal shows that in the 2008 and 2010 elections, illegal immigrant votes were in fact quite high.
"We find that some noncitizens participate in U.S. elections, and that this participation has been large enough to change meaningful election outcomes including Electoral College votes, and congressional elections," wrote Jesse T. Richman, Gulshan A. Chattha, both of Old Dominion University, and David C. Earnest of George Mason University.