Between being rounded on by Republicans for mocking Dr Christine Blasey Ford at a rally in Mississippi and reading the New York Times' exposé of his family's alleged tax fraud and subterfuge over the years, Donald Trump's week isn't going particularly well.

It's just got a bit worse too. New York City mayor Bill de Blasio says the city is "looking to recoup any money" Trump might be found to owe the city.

"It’s clear to me that there are real ramifications right now to what has been disclosed, either potential violations of law, or in cases where the statute of limitations has ended that there may be very serious civil penalties that can be applied by both the state and the city," De Blasio said at a press conference. "The city of New York is looking to recoup any money that Donald Trump owes the people of New York City, period."

preview for Trump's Five Biggest Lies

He went on: "There was a good old boy network that obviously Donald Trump played like a fiddle and evaded the kind of regulation and investigation and prosecution he should have received many times over."

It's not clear yet how much Trump could be shaken down for, but given that he's alleged to have been funnelled the equivalent of $413 million in today's dollars, as well as allegedly helping to hide gifts and loans within the family through shell companies and partnerships, it could be a significant wedge. New York's state Department of Taxation and Finance said yesterday that it would be "vigorously pursuing" the case.