We are joined in our latest edition of BM Talks by Dr Nigel Bowles, who taught American politics and history at Oxford and Edinburgh universities, along with authoring many books such as "Government and Politics of the United States".   

We asked: 

• Does the US Constitution prevent an authoritarian President?
• Can the US President remove the Federal Reserve Chair? 
• Are tariffs the exclusive power of the executive branch?
• Is Trump a genuine threat to the rule of law?
• Are Americans more polarised than at any time in history?