Clockwise from top: Donald J. Trump; a protester at a Santa Ana City Council meeting; California's Senate President pro Tem Kevin de Leon; a U.S. Immigration and Customs Enforcement agent.

How the Immigration Battle Lines Are Being Drawn

The shock that gripped immigrants and their advocates in the immediate aftermath of Donald J. Trump’s election has given way to an unprecedented mobilization. Here’s a rundown of what’s happening now and what may happen after his inauguration.