I'm sure that some illegal immigrants do find a way to vote, but it's hard to see this number being remotely close to "millions." There are about 10 million illegal immigrants of voting age; saying that 20% of them are somehow registered and voting seems absurdly high given the risks and restrictions. I could see maybe 1-2% at most going for it.
You'd have to believe that non-citizen voter turnout is at or near levels of citizen Latino turnout (as a share of their total populations). Anybody who knows the first thing about how non-citizens behave with regard to government institutions would find this laughable.
Then, you'd have to have African-American levels of support among non-citizen voters for Clinton just for Trump to break even in the popular vote.
Whenever it is easy and low risk for large numbers of people to cheat there will be widespread cheating. No citation is needed for that, that's just human nature all over the world. Therefore in areas where Democrat officials make it easy for illegals to vote and where there are millions of illegals living there will be a significant number voting. I don't know if the estimate of 3 million is close. If you have a better estimate let's hear it.
The only real reason to fear the implementation of voter ID and other laws to sure up the process is if you think you are benefitting from fraud. After all, Mexico requires voter ID and I don't hear any democrats calling them racist for it.
They have a national ID (which is free) and all elections are held at the federal level. I don't hear any republicans calling for national ID and federalized elections.
