We told you on Friday about how and why the media suddenly decided to return to the Obama birther story. It wasn't because it suddenly became relevant again. It wasn't because Trump brought it up. And it certainly wasn't because any new information came to light. The media suddenly started asking Trump about this again for one reason and one reason only: Trump is soaring in the polls and they're panicking, looking for a way to save Hillary.
So they decided to bring back to life one issue that they were sure they could hang on Trump in a damaging way. Let him say he doesn't think Obama was born in the U.S., they attack him for being a crazy conspiracy theorist. Let him say he was, they attack him for his "flip-flop." They returned to the issue because they figured Trump couldn't wriggle out no matter what he said.
Checkmate. Or so they thought.