I must respectfully disagree, that was bad but pails in comparison to the complete and ongoing devastation that is our current "immigration" system.
Teddy was the father of the 1965 immigration legislation that led us to where we are today. Every thing he said about the bill was a lie and had exactly the opposite effect.
In terms of long lasting negative impacts on the country nothing else over the last century comes close.
I’d say the infanticide of the bloody slaughter of 70 million unborn is by far the greatest modern-day tragedy in America - probably in her whole history - I know of no other blunder or tragedy in America that even comes close.
Usually it takes several generations to heal from the guilt and shame of nationally-sanctioned wholesale mass murder like abortion in America or the slaughter of Jews in Germany. That is not to mention the tens of millions of lives that have been slaughtered - irreversibly gone from us forever.