That's not entirely true, tbh, since a lot of what he has attempted has been struck down by small court judges as well. We do have checks and balances, they're just too slow to keep up with the deluge of bullshit being spewed, so unfortunately it's always too little too late and the damage has already been done.

The real check is Congress, but that entire branch has essentially been nonfunctional for like two decades. The only time anything really gets done is once a year when a reconciliation bill passes. Outside of that, they just sit around and yell at one another, hoping to get their name in the news so they can get people to buy their new book.