Fannie Mae and Freddie Mac back about half of new mortgages in the U.S. Now, talks are heating up about reshaping or shrinking the two companies, a move that could impact millions of Americans. Photo: Heather Seidel/The Wall Street Journal Don’t miss a WSJ video, subscribe here: http://bit.ly/14Q81Xy More from the Wall Street Journal: Visit WSJ.com: http://www.wsj.com Visit the WSJ Video Center: https://wsj.com/video On Facebook: / videos On Twitter: / wsj On Snapchat: https://on.wsj.com/2ratjSM #WSJ #mortgage