I don't think the Obama comparison is very useful. Trump faces a vastly more difficult problem than Obama did. For most of his presidency, Obama simply continued the Operation Streamline era policies that he inherited from Bush. He didn't have to clean up after a previous administration that had completely lost control of the border, allowing somewhere between ten and forty million immigrants through. And Obama didn't have to contend with dozens of states and cities declaring themselves sanctuaries, completely off limits to meaningful immigration enforcement, even of criminal migrants.

My own state promptly made it illegal for local law enforcement to cooperate with border patrol or immigration enforcement agents in any circumstance.

So now, if we want our country to have meaningful borders, immigration enforcement has to be done the hard way, and it shouldn't be surprising that Kristi Noem's clown show is showing signs of clusterfuckery. It's actually surprising that things have gone as well as they have.