As we continue to pay closer attention to the political changes in America, there is no doubt that the former US president, Donald Trump, will be the center of the topics around the world. As Trump won the state of South Carolina, people are rather anxious about the future of the Republican Party and the nation. Meanwhile, the question we need to ask is: How much do the American voters truly understand Trump? Why is he the "greatest" con artist, according to our guest David Cay Johnston? Johnston joins the latest show to discuss his new book on Trump and his scam to American citizens.