Regan's amnesty for over 3 million illegals: https://www.npr.org/templates/story/story.php?storyId=128303...
Bush doubles immigration: https://immigration.laws.com/immigration-act-of-1990
Trump supports immigration in "greatest numbers ever" in 2019 State of the Union: https://time.com/5521860/2019-state-of-the-union-trump-trans...
The GOP has supported immigration since the civil war. Both parties are controlled by the same political forces, and neither are on the real left or right, however hard though they pretend to be.