Donald Trump on Tuesday announced he was running for president in 2016, a move that threatens to upend the already crowded Republican primary field. In his speech, Mr. Trump offered a blistering critique of the Obama administration and of politicians in general. He promised to “build a great, great wall” on the Mexican border, and present a tougher negotiating position with China. Here is the full transcript, as provided by Federal News Service (www.fednews.com).