Since OP didn't find it appropriate to include the context, I'll do it for them:

https://www.snopes.com/news/2023/10/04/trump-poison-blood-qu... -- not even Snopes agrees with this take, and it is wildly out of context.

This out of context take was started by Hasan Piker, a billionaire (or maybe multimillionaire I forget) zoomer streamer self professed 'socialist' lol:

"I was up in New Hampshire the other day. The biggest complaint they have—it’s with all of the problems going on in the world, many of the problems caused by Hillary Clinton and by Barack Obama. All of the problems—the single biggest problem is heroin that pours across our southern border. It’s just pouring and destroying their youth. It’s poisoning the blood of their youth and plenty of other people. We have to have strong borders. We have to keep the drugs out of our country. We are—right now, we’re getting the drugs, they’re getting the cash. We need strong borders. We need absolute—we cannot give amnesty."

I don't really like the phrase because it is definitely easy to use out of context - but heroin and fentanyl are in fact poisoing the blood of this country, and eliminating that is an admirable goal.

There is another quote where he uses the phrase and you can see the full video/context, but the bottom line is not even snopes can get on board with this interpretation and they definitely would if they could manage.

They once claimed a convicted terrorist wasn't a terrorist because there was no universally accepted definition of terrorism, since 'The Weather Underground' were a democrat-aligned group and they will bow down to anything left.

And yet, they still don't agree with what is being claimed here....

The other quote was also in reference to drugs:

"TRUMP: No, nobody has ever seen anything like this. And I think we could say worldwide. I think you could go to the... you could go to a banana republic and pick the worst one, and you're not going to see what we're witnessing now. No control whatsoever. Nobody has any idea where these people are coming from, and we know they come from prisons. We know they come from mental institutions [and] insane asylums. We know they're terrorists. Nobody has ever seen anything like we're witnessing right now. It is a very sad thing for our country. It's poisoning the blood of our country. It's so bad, and people are coming in with disease. People are coming in with every possible thing that you could have. And I got to know a lot of the heads of these countries. They're very cunning people. Very street-smart people. If they're not street-smart, they're not going to be there very long. And when they send up those caravans, and I had it ended, we had the safest border in the history of our country, meaning the history, over the last 80 years. Before that, I assume it was probably not so bad. There was nobody around. But, we had the safest in recorded history by far. The least amount of drugs in many, many decades.*"

Can you make a fake argument that this is implying race mixing is bad? I guess, but you'd be a liar. It is very clear he was using what is in my opinion a terribly worded phrase due to the ease of taking it out of context.... but you would be a liar if you said whattdb7893 said.