Scott Walker said on Monday for the first time that he supports building a wall at the southern border, and ending birthright citizenship, a day after Donald Trump endorsed the same policies. Wisconsin Gov. Scott Walker (R) said on Monday that his immigration proposals were "very similar" to those of the real estate magnate, who over the weekend released a tough new plan exclusively focused on enforcement and cracking down on unauthorized immigrants. Walker said that he, too, wanted to build a wall on the U.S.-Mexico border, which is one of Trump's most controversial proposals. "Earlier in the year, I...