A standing-room crowd of 800 packed the auditorium of Upper Merion Middle School on Wednesday night to listen to one speaker after another outline ways to mobilize against the man about to be inaugurated as president of the United States. Those who turned out for the gathering organized by Democratic State Sen. Daylin Leach of Montgomery County had come following two months of anger and frustration over Donald Trump's win in November. They were told to form Facebook pages with like-minded friends and try to expand followers; consider putting their "bodies on the line" in acts of civil disobedience in...