Since US President Donald Trump's election, Jamie Dimon has emerged as one of Wall Street's most prominent voices in Washington. The chief executive of JPMorgan Chase serves on the White House business advisory council and is chairman of the powerful Business Roundtable.

But in a series of calls on Friday to discuss the big bank's quarterly profits, Mr Dimon vented his frustration with gridlock in Washington.

"It's almost embarrassing being an American citizen ... and listening to the stupid s--t we have to deal with in this country," Mr Dimon said in one conference call.

The inability to make headway on significant legislation was "holding us back and it is hurting the average American. It isn't a Republican issue; it is not a Democratic issue."