Ohio Congressman Warren Davidson thinks crowdfunding may provide a solution to the controversial proposal of building a wall on the Mexican border. And, perhaps more notably, he suggested using a cryptocurrency to do so. During an interview with NPR’s Steve Inskeep, the U.S. lawmaker explained that he has already proposed letting the American public pay for the wall, which is opposed by Democrats but mades up a key aspect of President Donald Trump’s list of 2016 campaign promises. In particular, Davidson told Inskeep, he has suggested a private funding program wherein “the American people, or whomever should choose to donate,”...