What continues to amaze me about Trump is that banks don’t do due diligence on people claiming to be billionaires before extending them credit. Because Forbes reported that Donald Trump was worth $100 million (he was worth $5 million), he got access to massive lines of revolving credit that wouldn’t have been available if someone had actually looked at his finances. And when he defaulted, they continued to lend to him. American regulators need to step it up.