^^Oh, please. Trump has already started backing off of the worst of his campaign promises. Do as Hillary said and enter his presidency with an open mind.
To some of the other replies: I get that it's not LAPD's job to personally escort people back across the border. But what the article is implying is that if the LAPD is arresting and detaining someone for x offense, and in the process of doing that, they happen to learn that person is an illegal immigrant, they will not report that to the federal police forces, unless the crime is "serious" (whatever that is supposed to mean) . Assuming that an order for deportation of illegal immigrants that have committed a crime aside from their immigration is enacted during a Trump presidency, which seems pretty likely to happen, doing the action I just described is direct noncompliance with the orders of and disloyalty to the federal government.
You misunderstand the nature of American Federalism. Police departments are state organizations, created by state legislatures to enforce state laws. They have no authority to enforce federal law unless the Federal government authorizes them to do so. Even then, it would be a violation of state sovereignty to force state officers to enforce another jurisdiction's laws. It would essentially be the Federal government forcing a (sovereign) state to make something illegal, which is very very unconstitutional.