How did this Alaska wildlife refuge migrate into the GOP tax bill?

Part of the GOP tax overhaul tax bill that has not gotten a lot of attention is the possibility of opening up a pristine and long-protected part of Alaska to oil extraction. The Alaska National...

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MILES O'BRIEN: Let's turn now to our continuing coverage of the Republican tax bill.We have talked about some of its other impacts that go well beyond the matter of taxes.Tonight, we look at a particular part of the Senate bill that has not gotten a lot of attention,the possibility of opening up a pristine and long-protected part of the Alaska to oil extraction.William Brangham has been following this.He joins me now.William, we're talking about ANWR, the Alaska National Wildlife Rescue.It's a beautiful place.WILLIAM BRANGHAM: That's right.It is supposedly one of -- I think it's been called the Serengeti of America.It's 19 million acres, the northeast corner of Alaska, right up against the sea and theCanadian b...