Mnuchin reacts to accusations that move to allow lending program to expire are politically motivated

"There were a lot of people on the Democratic side who questioned giving me $500 billion that I could quote 'do with whatever I want' so I find it kind of ironic now that I'm being prudent and returning the money to Congress like I'm suppose to that people are questioning that," Treasury Secretary Steven Mnuchin told CNBC's "Squawk on the Street" Friday.