It’s interesting it’s undocumented aliens, not illegal.
Check it out:

Vice President Joe Biden, in a speech to the U.S. Hispanic Chamber of Commerce’s 2014 Legislative Summit, on Thursday said the 11 million illegal aliens in the United States “are already Americans.”

“Eleven million people living in the shadows I believed are already American citizens,” Biden said. “These people are just waiting, waiting for a chance to be able to contribute fully, and by that standard, 11 million undocumented aliens are already Americans in my view.”

Biden compared illegal immigrants to immigrants who legally entered the United States, saying it took “a lot of courage” to pick up and go to America where they don’t speak the language and no one seems to want them.