People keep forgetting that it's possible to legally migrate, work for awhile, and so on, and then "become illegal" due to deadlines or administration issues.

An example every tech worker should understand is H1-B, where as an added bonus your employer can make you illegal.

They're not just going after the so-called "illegal aliens", something made clear after the numerous extrajudicial killings by ICE officers recently, such as the one that occured yesterday.