A fateful step. Having raised the hopes of anti-Trumpers back home in Maine this way, she’ll annoy them even more now if she changes her mind and votes not to call anyone. She has to follow through.Trump fans will be angry, of course, but she has two trump cards (no pun intended) she’ll play for them. One is that she’ll vote to let the president call a witness or two as well. And the second is that she will, in the end, vote to acquit him. She’s trying to walk a tightrope here. Agreeing in principle to call witnesses...