ALEXANDRIA, UNITED STATES – OCTOBER 16: Republican presidential candidate Dr. Ben Carson answers questions from members of the press after delivering brief remarks to supporters at the King Street Retail Walk October 16, 2015 in Alexandria, Virginia. Carson discussed threats facing the United States during his remarks. (Photo by Win McNamee/Getty Images)
Scott Walker said he’d sign Wisconsin’s 20-week abortion ban without an exception for rape or incest, because women are mostly concerned about those issues “in the initial months” of a pregnancy. Chris Hayes talks with Sen. Tammy Baldwin and Joy Reid.