Where would I go to find hard evidence that illegal immigrants vote, and why hasn't Fox reported it?

Any San Francisco School Board election. They've been voting in those for years.

wasnt there like 19 illegal votes in 2016?

and only less than 50 in the last 20 years?

It is hard and costly to prove. Democrats control too many ballot recordsl

Right here. There were 19 foreign nationals arrested for illegally voting in the 2016 presidential election. Of course Trump said there were 3 million illegal votes, but as we all know, Trump is a fûcking liar. Oh and a bunch of people were arrested for voting in NC because they were ex-felons and voted anyway claiming they didn't know they weren't supposed to vote.

Try google. There were several imprisonments of illegal voters during the 2016 election.

Well your first problem is that you watch Fox as a way to obtain news

www.capoliticalreview.com

Study finds that 13% of non-citizens vote illegally. That equates to several Million bogus votes by some estimates.

try the New York Times

https://www.nytimes.com/2018/08/24/us/north-caroli...

It is routinely reported, though not on any of the "mainstream media" outlets as it does not match their narrative. Same with voting by other non-citizens You just aren't paying attention. Also, DNC-controlled places like Detroit don't even bother with fake ballots and just report false totals.

Stop believing Trumps lies