This is a wild take. He just thinks his policies will be so popular that even urban areas might go red in the mid-terms. It's delusional, but I can't see Democrats gaining much ground unless they stop flopping around on the ground like fish.
Even if Trump did say something like this, it wouldn't have any practical effect. States have their own constitutions.
This is a pretty deliberate falsification of what this idiot is saying using out-of-context quotes. He's saying that by cutting fraud they'll be able to raise $1 trillion. He said specifically that they wouldn't touch Social Security except for fraud.
Of course the claim that there's $1 trillion of fraud is false, but we don't need to promote misleading clickbait headlines like this when there's so much awful news coming out of this administration as it is.